Sets of High Strength Hexagon Bolt, Hexagon Nut. and Plain Washers for Friction Grip Joints 1. Scope This Japanese Industrial Standard specifies the sets of high-strength hexagon bolt, hexagon nut and plai'n washers for friction grip joints, hereinafter referred to as the "sets", to be used mainly for steel constructions. - Remark: In this standard,. units and numerical values given in { ) ara based on the International System of Units (SI), and are given for reference. 2. Composition A set shall be composed of one piece of high-strength hexagcn bolt for friction grip joint, hereinafter referred to as the Itbolt" , one piece of high- strength hexagon nut for friction grip joint, hereinafter referred to as the "nut", and two pieces of high-strength plain washers for friction grip joint, hereinafter referred to as the "washer", respectively specified in 3.
Transcript
Sets of High Strength Hexagon Bolt,
Hexagon Nut. and Plain Washers for
Friction Grip Joints
1. S c o p e
T h i s J a p a n e s e Indus t r i a l S t a n d a r d s p e c i f i e s t h e s e t s of high-strength hexagon bo l t , hexagon nut and plai'n w a s h e r s f o r f r i c t i o n g r i p jo in t s , h e r e i n a f t e r r e f e r r e d to a s the "se t s" , t o be u s e d mainly f o r s t e e l cons t ruc t ions . -
Remark : In t h i s s t a n d a r d , . u n i t s a n d numer ica l va lues given in { ) a r a based on the I n t e r n a t i o n a l S y s t e m of Units (SI ) , and are given f o r r e f e r e n c e .
2. Composi t ion
A s e t s h a l l b e composed of o n e p i e c e of high-strength hexagcn bolt f o r f r i c t i o n g r i p jo in t , h e r e i n a f t e r r e f e r r e d t o as the Itbolt" , one p iece of high- s t r e n g t h hexagon nut f o r f r i c t i o n g r i p jo in t , h e r e i n a f t e r r e f e r r e d to a s the "nut" , a n d two p i e c e s of high-s t rength p la in w a s h e r s f o r f r i c t i o n g r i p jo in t , h e r e i n a f t e r r e f e r r e d to as t h e " w a s h e r " , r e s p e c t i v e l y spec i f i ed in 3.
-B 1156--
?. Classes and Grades
The s e t s shall be classified into Classes 1 , 2 and 3 according to mechanical properties of the parts constituting the se t s , and each c lass shall be further subclassified into A and B according to torque coefficient. The grades of the par ts constituting the set shall be classified a s given in Tables 2 to 5 according to the mechanical properties.
The c lasses in combination with the grades a c c o r d ~ n g to mechanical prop- e r t i e s of the constituting par ts shall be a s given in Table 1.
*i
Table 1
Remark: Those which a r e given in parentheses should not apply a s far a s possible.
4. Mechanical Properties
Classification of se t
4.1 Mechanical Properties of Bolt
C l a s s according to mechanical properties
Class 1
Class 2
(Class 3)
Applicable grade according to mechani- cal properties of constituting par ts
4.1.1 Mechanical Proper t ies of Test Piece Machined from Bolt The mechanical ropert ties of the tes t piece machined from bolt shall co rn~lv with the
Class accordingto torque coefficient
A
B
A
B
A
. . requiremenis oi Table 2 , when the tes t piece i s subjected to the t e s t provided in 11.1.1 (1) (1.1).
I B
Washer
F 35
Bolt
F S T
F 10 T
(F 11 T)
The impact value, when particularly required, shall be- subject to an agreement between the part ies concerned.
Nut
F 10 ( F 8 )
F 10
Table 2
Grada according to mechanical propurt~er of bolt
F 8T --------
F 1 0 T
F 11 T
Note * 1 ~ / r n r n ~ = I MPa
proof strear
I$:;$ M min
{an. 6 min) - 90 min
i882.6 m~n.]
95 min (931.6 mi%)
Tonmil. atrenfl kgflmm' INlmm')
80 t 100 1704.5 6 980.7)
100 C. 120 j980.7 t 1176.8)
110 r- 130 !1078.7 G 1274.9)
E l o D F ~ ~ o ~
%
16 min
14 min
14 min
Reduction of area
%
45 m i n
40 m i n
40 min
4.1 . 2 Mechanical P r o p e r t i e s of Ful l -Size Bolt T h e mechanical p r o p e r t i e s of t h e ful l -s ize bol t , when t e s t e d i n a c c o r d a n c e with 1 1 . l . 1 (1 ) (1 .2) , s h a l l b e s u c h as not t o b r e a k a t l e s s than t h e t ens i l e load (min.) spec i f i ed i n T a b l e 3 and a l s o not t o b r i n g f o r t h head s e p a r a t i o n when the t e n s i l e load is increased . In add i t ion , when t h e bolt is t e s t e d i n a c c o r d a n c e with 11 . l . 1 ( 2 ) , t h e r e s u l t s s h a l l conform t o t h e h a r d n e s s r e q u i r e m e n t s of T a b l e 3 .
T a b l e 3 -
Remark: F o r t h e bolt which h a s been sub jec ted t o t h e t e n s i o n t e s t , the h a r d n e s s t e s t may be omitted, s u b j e c t t o t h e agreement between t h e parties concerned .
Crade according to mechanical properties ot bolt
F 8 T ----- F 1 0 T -
F 1 1 T
4.2 Mechanical P r o p e r t i e s of Nut T h e mechanica l p r o p e r t i e s of the nu t , when t e s t e d i n a c c o r d a n c e with 11 . l . 2. s h a l l conform t o t h e r e q u i r e m e n t s of T a b l e 4.
T a b l e 4
Hardnemm
18 !. 31
27 38 - . ,,,
Tensile load (mh. ) (kgf) (LN]
Designation ot screw threads
4.3 Hardness ' of Washer T h e h a r d n e s s of t h e w a s h e r , when t e s t e d i n a c c o r d a n c e with 11.1.3, s h a l l conform t o t h e r e q u i r e m e n t s of T a b l e 5.
T h e w a s h e r s s h a l l not be sub jec ted t o s u r f a c e h a r d e n i n g s u c h as c a r b u r i - ( s a t i o n , q u e n c h i n g and tempering.
T a b l e 5 . .
7 5 7
M 1 2
6740 (66.1 1
8430
G r a d e a c c o r d i n g t o mechanica l p r o p e r - ties of nu t
F 8 '
F 1 0
M 1 6
12600 1123.6) '
15700
A d 2 0 0
19600 (192.2)
24500 (240.3)
27000 (264.8)
(82.67) (151.0)
9270 (90.91) (169.71
G r a d e a c c o r d i n g t o mechanica l p r o p e r t i e s of washe-
F 35
G u a r a n t e e d load
S a m e as t h e t ens i l e load (rnin.) of bol t specif ied in T a b l e 3.
H a r d n e s s
H a r d n e s s
HRC 35 t o 45
M 3 0
44900 (440.3)
54100 (550.2)
61700 ' (645.1)
,
Min.
HRB 85
HRB 95
M27
36700 (359.9)
4SWO (150.1)
50500 (195.3)
M 2 2 I M 2 4
Max.
HRB 100
HRC 35
24200 1237.3)
30300 (297.1)
3 (326.51
28200. (276.61
35300 (316.2)
38800 (380.5)
5. Torque Coefficient of Set
The torque coefficient of the se t . when tested in accordance with 11.2, shall conform to the requirements of Table 6 . , where the value shall be obtained from the following formula:
k- = 'I' x 1000 J x .\'
where torque coefficient
7': torque (moment to fasten nut) (kgf.m) { N ' m } J : basic thread outside diameter of bolt (mm)
X : axial force of bolt 1') ( k g f ) { ~ } . .
Table 6
Notes ( I ) The axial force mentioned above means a tensile force to act in axial direction of the bolt caused by a torque to fasten the bolt.
Division
Mean of torque coefficient values of one manufacturing lot ( 2 )
Standard deviation of torque coefficient.-. values of one manufacturing lot ( 2 )
(') The one manufacturing lot. mentioned above means the lot of se t which the bolt, nut and washers of each identical lot constitute. The identical lot of the bolts, nots and washers mentioned herein, shall be a s defined below:
(1) The identical lot of the bolts is defined a s a manufacturice lot composed by the bolts, which a r e identical in:
Class of se t according to torque coefficient
(a) melt number of material (s teel ) ,
(b) c lass according to mechanical proper t ies ,
(c) designation of screw threads , , (d) length I ,
(e) machining process,
(f) heat treatment conditions, and
A
0.110 to 0.150
0.010 max.
(g) surface treatment conditions, when the bolts a r e subjected to surface treatment. However, the bolts having slight variations of length 1 may be considered to be of an identical lot.
. - (2) The identical lot of the nuts is defined as a manufactwing
lot composed by the nuts which a r e identical in:
B
0.150 to 0.190
0.013 max.
(a) melt number of material (s teel ) ,
-B 11k
(b) c l a s s accord ing , to mechanical p r o p e r t i e s ,
(c) designation of s c r ew threads , . f
(d) machining , p r o c e s s ,
(e) heat t reatment condition, and ,- -
(f) s u r f a c e t reatment condition, when the nuts are sub- jected t o s u r f a c e treatment.
. .
(3) T h e identical lot of the washers i s defined a s a manufactur- ing lot composed by the washers which a r e identical in:
(a) melt num+r of material ( s t ee l ) .
(b) c l a s s acco rd ing to mechanical p rope r t i e s ,
(c) de ' s i pa t ion of washer ,
(d) machining p r o c e s s ,
(e) heat t reatment condition, and
- (f) s u r f a c e t reatment condition, when the washe r s are . subjec ted t o su r f ace treatment. . . - . . .
!
4 Remark: A measure in t h e c a s e where the torque coefficient value t e s t . . P for the s e t is impossible due to s h o r t e r length r sha l l be taken
by a n agreement between the par t ies concerned.
-1 6. Shape and Dimensions
T h e shape and dimensions of the bol ts , .nuts and w a s h e r s sha l l be a s specif ied in Attached, Tab le s 1 t o 3.
7. S c r e w Threads
T h e sc rew th reads of the bol t s and nuts shal l be me t r i c coarse sc rew th reads specified in J I S B 0205, and t h e i r g rade sha l l be of 6 ~ / 6 ~ specif ied in J I S B 0209.
T h e s c r e w th reads of the bol t s sha l l have been made by th read rolling. . $
8. Appearance .
8.1 Appearance of Bolt T h e appearance of the bolt s h a l l be in compliance with the requirements of Attached Tab le 1 in sur face roughness , and , in addition, f r e e from quenching c r a c k s and such defec ts harmful t o u s e as f laws, b u r r s , r u s t and damage of s c r e w t h r e a d s .
8.2 Appearance of Nut T h e appea rance of the nut sha l l be in compliance with the requirements of Attached Tab le 2 in su r f ace roughness , and , in addition, f r e e from quenching c r a c k s and such de fec t s harmful to u s e a s f laws, b u r r s and ru s t .
8.3 Appearance of Washer T h e appearance of the w a s h e r sha l l be in c o m ~ l i a n c e with the reaui rements of Attached Table 3 i n s u r f a c e roughness , and -.
in ahdition, f r e e ~ f r o m Guenching c r a c k s and such de fec t s harmful t o use as f laws , b u r r s , r u s t and remarkable buckling.
9. Materials
The materials f o r the bol t s , nuts and washers s h a i l be such that the i r products may sa t i s fy the requirements of 4 to 8.
10. S u r f a c e Treatment
T h e bolts, nuts and washers may be subjected t o any su r f ace treatment, provided that it might not a f f ec t adverse ly the i r quality.
11. T e s t s and Measurements
11.1 T e s t s on Mechanical P rope r t i e s
11.1.1 T e s t s on Mechanical P rope r t i e s of Bolt T h e t e s t s on mechanical proper t ies of the bolt sha l l cons is t of the tension t e s t and hardness t e s t '
descr ibed below:
(1) Tension T e s t s of Bolt The tension t e s t s of t he bolt sha l l be ca r r i ed out f o r the t e s t p ieces machined from bolt and the full-size bolt.
(1.1) Tension T e s t s f o r T e s t P i eces The tension t e s t s fo r the t e s t pieces sha l l be made as described in , the following a r t i c l e s .
(1.1.1) T e s t P i ece T h e t e s t piece shal l be as follows:
(1.1.1.1) F o r the t e s t piece No. 4 t e s t p iece specif ied in J I S Z 2201 which has been machined from the bolt as shown in Fig. 1 (A) o r (B) sha l l be used.
Fig. 1 - -
(A) (B)
Gauge length
Diameter
Length of reduced sect ion P= approx. 6 0 rnm
Radius of f i l le t R- 15 mm min.
F o r the bolt with th reads of M 12 to M 24, when unable tq be machined to the dimensions given above, the dimensions L and D sha l l be determined assuming that L = 3.54 Dl and P sha l l be determined assuming that P-L + approx. 10 mm. In t h i s case, the dimension .
D sha l l be not l e s s than the value given in Tab le 7.
Tab le 7
(1.1 . I . 2) If i t is impossible to machine a t e s t piece owing to the ' shor tnes s of the bolt length r , a t e s t b a r taken out of the
material of the lot (3) identical with the bolt mater ia l i s mixed into the heat treatment lot same as fo r the bolt and, a f t e r the heat t reatment , the No. 4 t e s t piece specified in J I S Z 2201 sha l l be taken out of . that t e s t bar . In this c a s e , the dimension D of the t e s t piece sha l l be the same a s D given in Table 7. . ..
Designation of s c r e w threads
M 12
M 16
M 20
M 22
M 24
Note (3) T h e identical lot mentioned above is defined a s that identical to the bolt in melt number of material ( s tee l ) and diameter.
D (mm)
6
8
8 .
10
12
1 1 2) Tes t ing ~ e t h o d s T h e t e s t sha l l follow the method specified i n J I S 2 2241.
(1.2) Tension T e s t s of Full-Size Bolt The tension t e s t s of full-size bolt sha l l be c a r r i e d out as descr ibed below: Put a wedge ( see Fig. 3) , not less than HRC 45 in ha rdness , beneath the bearing.face of a bolt as shown in Fig . 2 by employment of a j ig having sui table construct ion, shape , dimensions and suff icient rigidity. Mate i t s s lope to be in contact with a s ide of the hexagon head, and make the j ig o r a nut to engage with the threa$ed port ion on the opposite s ide s o that some six th reads of the complete threads remain unengaged in the head s ide of the bolt. Examirie whether the bolt b reaks o r not unde r the tension load in ax ia l d i rec t ion (min.) given in Table 3 , and examine whether the sepa ra t ion of bolt head br ings forth o r not when f u r t h e r increas ing the tens i le load until the bolt b reaks down.
In the event of the s c r e w th reads coming out due to col lapse of the s c r e w th reads , r e t e s t sha l l be made a f t e r e i t h e r improving t h e thread accuracy of the jig o r the nut o r by inc reas ing the engaging length.
Fig. 2 (a) Fig- 2 (b) Fig. 3 Fig. 4
t
L e t t e r d ind i ca t e s t he bas ic ou ts ide d i a m e t e r of bolt t h r e a d , and c the c l e a r a n c e between the ins ide dia- m e t e r of wedge and dimension d.
Unit: mm
Remark: Where the s l ope of the j i g used f o r t h e t en s ion t e s t comes i n coritact with t h e bolt bea r i ng face, as shown i n F ig . 4, because of i t s s l ope same as incl inat ion of t h e wedge shown in F ig . 3 and the ha rdnes s and r ig id i ty are in compl iance with t he re- quirements of 1 1 . 1 . 1 (1) ( 1 . 1 . I ) , t h e wedge becomes u s e l e s s .
unthreaded
tJ
(2) Ha rdnes s T e s t of Bolt T h e h a r d n e s s t e s t of bol t s h a l l follow the method specif ied in JIS Z 2245. In t h i s case, measu r ing places s h a l l be positibned a t t h r e e points p e r one s amp le o n t h e s i d e face of t h e head . Mean of t he values obtained s h a l l be rounded bff t o a n i n t e g e r in a cco rdance with the r u l e p rov ided i n JIS Z 8401, and i t s h a l l be taken a s t he h a r d n e s s of the sample.
Under 2 d
6 +0 .5O -
2 d and o v e r
10 2 0 . 5 "
11 .1 .2 T e s t s on Mechanical P r o p e r t i e s of Nuts T h e t e s t s on the mechanical p r o p e r t i e s of nu t s s h a l l c o n s i s t of the h a r d n e s s t e s t and guaranteed load t e s t d e s c r i b e d below:
(1) H a r d n e s s T e s t of Nut T h e h a r d n e s s t e s t of nut s h a l l follow the method specif ied i n J I S Z 2245. In t h i s c a s e , m e a s u r i n g p laces s h a l l be posi t ioned a t t h r e e po in t s p e r one sample on t h e bear ing face of the nut. Mean of t h e va lues obtained s h a l l be rounded off to a n i n t e g e r in a c c o r d a n c e with t h e r u l e provided in J I S Z 8401, and i t s h a l l be t aken as t h e h a r d n e s s of the sample.
(2) Guaran teed Load T e s t of Nut T h e guaran teed load t e s t of nut s h a l l b e performed in a m a n n e r s i m i l a r t o the bolt t ens ion t e s t d e s c r i b e d in 11.1.1 (1) (1.2) by engag ing a sample nut in p l a c e of t h e i n t e r n a l th read j i g and th-en by app ly ing t h e guaran teed load given in T a b l e 4 , and the e x i s t e n c e of a b n o r m a l i t i e s on t h e sample s h a l l be examined. In t h i s case, t h e wedge is u s e l e s s . Ins tead of t h e bol t , an e x t e r n a l
. thread j i g f o r t e s t i n g may be used .
11.1 .3 H a r d n e s s T e s t of Washer T h e h a r d n e s s t e s t of w a s h e r s h a l l follow t h e method d e s c r i b e d in J I S Z 2245. In t h i s c a s e , t h e measur ing p l a c e s s h a l l be posi t ioned a t t h r e e points p e r o n e sample on t h e b e a r i n g face of t h e w a s h e r . ~ e a n of t h e value obtained s h a l l be rounded off t o a n i n t e g e r in a c c o r d a n c e with the r u l e d e s c r i b e d in J I S Z 8401, a n d i t s h a l l be taken as t h e h a r d n e s s of the sample.
11.2 T o r q u e Coeff ic ient T e s t of Set T h e t e s t f o r t o r q u e coefficient of s e t s h a l l be c a r r i e d out a s d e s c r i b e d below:
(1) T h e to rque coeff ic ient value t e s t of s e t s h a l l be performed f o r t h e set u n d e r t h e s e r v i c e condi t ion and the s a m e t e s t s h a l l not be r e p e a t e d for the s a m e sample.
(2) T h e t e s t s h a l l be per formed by employment of a t o r q u e t e s t e r o r a n a x i a l f o r c e mete r .
. . When t h e to rque t e s t e r is u s e d , t o r q u e and ax ia l f o r c e s h a l l be r e a d
t o half t h e r e s p e c t i v e s c a l e i n t e r v a l f rom t h e torque-axial f o r c e r e c o r d d iagram on t h e m e a s u r i n g a p p a r a t u s which h a s been connec ted t o t h e - t e s t e r . . -
When'a m e t e r o t h e r than t h e t o r q u e m e t e r is u s e d , t h e sample s h a l l be a t t ached to the a x i a l f o r c e m e t e r and t o r q u e s h a l l be appl ied g radua l ly t o the nut s o as not to c a u s e e r r o r . T h e t o r q u e s h a l l be m e a s u r e d with t h e t o r q u e m e t e r ( s e e J I S B 4650) and t h e bolt a x i a l f o r c e with t h e ax ia l f o r c e m e t e r t o half t h e s c a l e i n t e r v a l of t h e m e t e r .
In t h i s c a s e , t h e w a s h e r s h a l l not t u r n . If t h e j i g which c o m e s in cqn tac t with t h e bolt b e a r i n g f a c e is equal t o o r h a r d e r than h a r d n e s s o f the w a s h e r , the w a s h e r a t t h e bolt b e a r i n g face may be omitted.
( 3 ) . T h e m e a s u r e m e n t s of t h e t o r q u e appl ied to t h e nut and the bolt a x i a l f o r c e produced by t h e t o r q u e s h a l l be c a r r i e d o u t at t h r e e p l a c e s under t h e bolt a x i a l f o r c e r a n g i n g as given in T a b l e 8. In t h e c a s e of m e a s u r e m e n t s with a t o r q u e t e s t e r , t h e m e a s u r e m e n t s may be made only a t one point n e a r t o the median of the value given in T a b l e 8.
Table 8
--. --- I-' I U .r
Unit: kgf { k ~ ]
(4) The mean va lue ( o r only one calculated value for .one point measurement - with to rque t e s t e r ) of t h r e e calculated va lue s obtained by subst i tut ing into the formula given in 5. the t o rque and bol t axial fo r ce obtained by the measurement in a cco rdance with t he manne r de sc r i bed in (3) and the ba s i c dimension of s c r e w thread ou t s i de d i a m e t e r of bolt sha l l be rounded off t o t h r e e p laces of dec imals i n a c c o r d a n c e with the r u l e provided i n J I S Z 8401, and the r e s u l t sha l l be taken as the to rque coefficient va lue of t h e sample.
l;rade according to rncchanical prop~rl leB 01 boll
(5) The s c a l e i n t e rva l f o r t he torque-axial f o r c e d iagram obtained from the to rque t e s t e r sha l l be 1 kgf-rn { 10 N-rn) o r less f o r to rque and 1 $ o r less of t h e value t o be measured f o r the axial fo r ce .
( 6 ) T h e s c a l e i n t e rva l of t he torque meter s h a l l be 1 kgf -m (10 N-m } o r less, and the ins t rumenta l e r r o r sha l l be 1 $ o r less of t h e value indicated by each s c a l e within t he r a n g e of ax i a l f o r c e t o be measured .
Axial f o r c e 01 bolt ----- Designation of s c r e w thread8 --
(7) The s c a l e i n t e r v a l of the.axia1 f o r c e m e t e r s h a l l be 1 $ o r less f o r ax ia l f o r c e s t o be measu red , and t he i n s t rumen ta l e r r o r sha l l be 2 $ o r l e s s of t h e value indicated by each s c a l e within t h e r a n g e of ax i a l f o r c e to be measured .
11 .3 S u r f a c e De fec t T e s t s f o r Bol ts T h e c r a c k s , f l a w s and t h e l ike on bolt s u r f a c e s shal l be examined e i t h e r by the liquid pene t r an t t e s t i n g method specif ied in 4. of J I S Z 2343 o r by the magnetic pa r t i c l e t e s t i n g method spec i f ied in 5. of J I S C 0565.
378nC 5130 7020 0,9530 " ' I 1I:ll. Oi =SO. 3Li( la. 84 L93.46)
12.1 Shave and Dimensional Inspection T h e inspec t ion f o r t h e shape and dimensions of a s e t s h a l l be performed by t e s t i ng t h e bo l t , nut and w a s h e r s const i tut ing the s e t by d i r e c t measurement , by employment of l imit gauge o r by o t h e r su i tab le m e a n s , and the t e s t r e s u l t s of e ach p a r t s h a l l meet t h e r equ i r e - ments specif ied in 6.
M 20 1 M 22
llWO t14900 13600 t.18.100 1107.9 C146.1) 1133.4 C 180.4
12.2 S c r e w T h r e a d s Inspect ion T h e s c r e w t h r e a d s inspectioh f o r t he bolt and nut s h a l l be c a r r i e d out by us ing the limit gauges ( f o r 6 H and f o r 6 g) f o r me t r i c c o a r s e s c r e w t h r e a d s specif ied i n J I S B 0251 o r by employment of o t h e r su i t ab l e s c r e w t h r e a d s inspec t ing instrument , and t h e r e s u l t s s h a l l comply with t he r equ i r emen t s of 7.
7
m. K A ~ T K A AGEB UTAMA J A K A R T A
12.3 Appearance Inspection T h e appearance inspection of a s e t shall be performed f o r the bolt, nut and washe r s constituting the s e t , and the r e su l t s of each pa r t shal l comply with the requirements specified in 8.1 to 8.3. The inspection f o r s u r f a c e defect sha l l be made in accordance with 11.3 and the s u r f a c e roughness inspection sha l l be made visually o r with the aid of su r f ace roughness measuring instrument specif ied in J I S B 0651 by comparing with the roughness comparison specimens specified in J I S B 0659.
. . . . .- - . . . - . . - .
1 2 .4 Inspection o n . ~ e c h a n i c a l P r o p e r t i e s
12.4.1 Inspection on Mechanical P rope r t i e s of T e s t P i eces Machined from Bolt T h e inspection r e su l t s on the mechanical proper t ies of t e s t pieces mechined from bolts shal l comply with the requirements of 4.1.1, when the test pieces a r e inspected on proof s t r e s s , tens i le s trength, elongation and re- duction of a r e a in accordance with the methods of 11.1.1 (1) (1.1).
In th is inspection, the cer t i f ied level of quality of the inspection lot(4) sha l l be laid down s o t h a t ' 1;s 0.125 % (5) (a+0.05) and 1:s 12.5$(6) ( 8<: 0.10).
T h e sampling inspection plan should be preferably in accordance with the sampling inspection plan by va r i ab le s provided in J I S Z 9C03.
Notes (4) One inspection lot mentioned above i s t he same a s one manufacturing lot defined in ( I ) , Note (2), 5.
(5) The value of I'r r 0.125 $ i s a representa t ive value, which rep- , r e s e n t s the values P, within the range from 0.11 3 to 0.140 $.
(6) The value of P, , 12.5 % is a representa t ive value, which rep- r e s e n t s the values p, within the range from 1 1 .3 to 14.0 $.
Remark: The notations P', P, , cr and fi a r e as defined in J I S Z 9001 . 12.4.2 Inspection on Mechanical P rope r t i e s of Full-Size Bolt The
inspection r e s u l t s on mechanical p rope r t i e s of full-size bolt sha l l comply with the requirements of 4.1.2, when the bolts are inspected on tensi le load and ha rdness in accordance with 11.1.1 (1) (1 .2) and 11.1.1 (2).
In t h i s insp&tion, the cert i f ied level of quality of the inspection lot(7) sha l l b e l a i d d o w n s o that 1)';; 0.125(5) (a+0.051 and lJ,b 8$(8) (B=0 .10 ) .
9 T h e sampling inspection plan should be preferably in accordance with the
4 sampling inspection plan by va r i ab le s provided in J I S Z 9003.
Notes (7) One inspection lo t mentioned above is the same as one manufacturing lo t defined in ( I ) , Note(2), 5.
(8) T h e value of P,,8 $ is a representa t ive value, which r ep resen t s the values P, within the r ange from 7.11 to 9.00 $.
12.4.3 Inspection on Mechanical P rope r t i e s of Vut T h e inspection r e s u l t s on mechanical p rope r t i e s of nut s h a l l comply with the requi rements of 4.2, when the nuts a r e inspected on the h a r d n e s s and guaranteed load in accordance with 11.1.2.
In th is inspection, the cer t i f ied level of quality of the inspection lot(9) shal l be laid do.wn as follows:
( 1 ) The certified level of quality of the inspection lot(9) in t he hardness inspection or the nut sha l l be laid down s o that 1 % ~ 0.125 $ (5) (cr+O. 05) and 1:s 8%(8) ( 8 = 0.10).
The sampling inspection plan should be preferably in accordance with the sampling inspection plan by va r i ab le s provided in J I S Z 9003-
(2) F o r the guaranteed load inspection of the nu t s , the check inspection shal l be ca r r i ed out f o r one sample s i z e of two o r m w e pieces f o r one inspection lot(9) and a l l of the samples sha l l meet the requirements of 4.2. * *
Note (9) One inspection lot mentioned above i s t he same as one manufacturing lot defined in (2). Note (2). 5.
12.4.4 Inspection on Hardness of Washer T h e inspection r e s u l t on ha rdness of the washer shal l comply with the requirement of 4.3, when the washe r i s inspected in accordance k i t h the methbd of 11.1.3.
In th is inspection, the ce r t i f i ed level of quality of the inspection lot( l0) sha l l be laid down s o that ID.> 0.125 $ (5) ( a + n . 05) and lo,& 8 $
( 1 5 + i ~ . Ill).
T h e sampling inspection plan should be preferably in accordance with the sampling inspection, plan by var iab les provided in J I S Z 9003.
Note (10) One inspection lot mentioned above is the same as one manufacturing lot defined in (3) . Note (2), 5.
12.5 Inspection on Torque Coefficient of S e t T h e inspection r e s u l t on torque coefficient value of the s e t sha l l c o m ~ l v with the reaui rement of 5.. when . " the s e t i s inspected in accordance with 1 1.2. .
In th is inspection, the cer t i f ied level of quality of the inspection lot(l l ) sha l l be laid down a s follows:
(1) T h e cert i f ied level of quality of s tandard deviation on the torque co- eff icient value of the inspection lot(1 l ) sha l l be s e t under t h e level of significance of 5 $ o r less and under t he s t anda rd r e l a t ive e r r o r of 8 $ o r less.
Remark: F o r t he application of ru l e of 12.5 ( I ) , i f t he p r o c e s s is in a s tab le s t a t e , the l a t e s t E - R control cha r t o r inspect ion da ta including the d a t a of t he lot t o be inspected may be used.
If par t icu lar ly r equ i r ed , t he sample s i z e may be lessened by slightly en larg ing the s tandard r e l a t ive e r r o r than the specified value, subject t o t he agreement between the p a r t i e s concerned.
(2) T h e cert i f ied leve ls of qual i ty f o r t he mean value of the torque co- efficient f o r the inspection lo t ( l1) sha l l be laid down s o that they may be not less than the value given in Tab le 9. I -
Note ( I1) One inspection lot mentioned h e r e i s the same as one manufacturing lot defined in Note (2), 5.
- 1490 - PT. KAQTK~ h ~ 8 IIVW J A K A R T A
Table 9
Remarks 1.. The notations met, ,111'. ale" and m" are as defined in J I S Z 9003.
2. F o r the s tandard deviation, the va lues obtained in accordance with 12.5 (1) sha l l be used.
Classif icat ion according to torque coefficient value
A
B
T h e s e t sha l l be designated in the o r d e r of the number o r t i t le of this standard, class according to mechanical proper t ies of t he s e t * c l a s s according to torque coefficient value of t he s e t , designation of s c r e w threads x bolt length ( I). and par t icu lar ly specified mat te rs ( l2) .
Note ( I2 ) T h e par t icu lar ly specified matter is to be shown in parentheses.
Example:
J I S B 1 186 C l a s s 1 B M16 x 50
Values in respect to upper limit
S e t of High St rength Hexagon Bolt , Hexagon Nut and Pla in ., . . (Flat
A Washers f o r Fr ic t ion Gr ip J o i n t s C l a s s 2 M20 x 60 point
m; ( a i 0 . 0 5 )
0.150
0.190
Values in. respect to lower limit
(Number of s tandard o r name of s tandard)
s
14. Marking '
14.1 Marking of Products T h e marking of the p a r t s constituting a s e t shal l
R be done as descr ibed below:
16 (1) The following pa r t i cu l a r s sha l l be marked e i t h e r in rel ief o r by starnp- i ng on the upper f a c e of the bolt head.
(1.1) Notation (F 8 T , F 10 T o r F 11 T) designating the class according to mechanical p rope r t i e s of bolt
(1 .2) Regis te red trademark o r identification mark of manufacturer
(2) T h e notation designating the class according to mechanical proper t ies of
: 5 t he nut sha l l be marked e i the r in rel ief o r by stamping by using marking symbol of Table 10 on the upper face of the nut.
- 1491 -
I I I ~ ~ (p+O. 10)
0.160
0.200
~n." ( a +O. 05)
0.110
0.150
~n," (p+O. l o )
0.100
0.140
T h e r e g i s t e r e d t rademark o r iden t i f i ca t ion mark of manufac ture r may be marked , sub jec t to t h e agreement between t h e p a r t i e s concerned .
T a b l e 10
C l a s s a c c o r d i n g t o mechanical p r o p e r t i e s of nut I Mark ing symbol
(3) T h e w a s h e r is exempted f r o m m a r k i n g t h e no ta t ion d e s i g n a t i n g t h e c l a s s a c c o r d i n g t o mechanical p roper t i es :
T h e r e g i s t e r e d t rademark o r ident i f icat ion m a r k of t h e m a n u f a c t u r e r may b e m a r k e d , s u b j e c t to the a g r e e m e n t be tween t h e p a r t i e s concerned .
14.2 Marking on P a c k a g e T h e package s h a l l be c l e a r l y m a r k e d with t h e fol lowing p a r t i c u l a r s :
( 1 ) T i t l e of t h i s s t a n d a r d
(2) c l a s s ' a c c o r d i n g to mechanical p r o p e r t i e s of s e t
(3) C l a s s a c c o r d i n g to t o r q u e coef f ic ien t va lue of s e t
(4) Designat ion of s c r e w t h r e a d s x bolt l eng th ( I )
( 5 ) Quant i ty
(6) P a r t i c u l a r l y s p e c i f i e d m a t t e r
(7) M a n u f a c t u r e r ' s name o r r e g i s t e r e d t r a d e m a r k
(8) Manufactur ing l o t number of s e t
(9) Month a n d y e a r of inspect ion f o r s e t
15. C a u t i o n s a t t h e T ime of C o n t r a c t
It is recommended t h a t the c o n t r a c t inc ludes t h e fo l lowing condi t ions:
f (1) that t h e m a n u f a c t u r e r of sets, bol ts , n u t s o r w a s h e r s is t o submit t h e -
c o n t r o l c h a r t s o r o t h e r qual i ty c o n t r o l d a t a o r i n s p e c t i o n d a t a s h e e t s . .. . .
(2 ) tha t t h e m a n u f a c t u r e r of t h e s e t s is t o be given t h e packag ing s t a n d a r d .
DY. KAATYKA A ~ M U J A K A R T A
Attached Table 1 . High Strength Hexagon Bolts for Friction Grip Joints
Eccentricity Inclination of Inclination of head bearing face . of side face
Unit: mrn
Notes (I3) The screw end may be either of flat point or of oval point.
(' 4, The position for measurement of the dimension d, shall be determined s o that l.sd,lr .
Remarks 1 . T h e length r of incomplete t h r e a d s sha l l number about two th reads and that or rull t h r e a d s about t h r e e th reads .
2 . The dimension d, may be made s o as to be approximately same a s the pitch diameter of s c r e w t h r e a d , subject to t he agreement between the ~ a r t i e s concerned.
In this c a s e , the rad ius r under the head may be made as follows:
Unit: mm
3 . T h e dimensions I marked with 0 indicate the recommended lengths r .
Designationor s c rew th reads
r
4. The dimensions I and s o t h e r than given in the table above, if part icularly requi red . may be used as specif ied. .
M l b I M1O M i 2
2 .5 t o 3 . 8
M 2 4
1 . 2 to 2 . 4
M 2 7 ( M 3 O
2 . 0 t o 3 . 3
Attached Table 2 . High Strength Hexagon Nuts for Friction Grip Joints
Eccentricity Inclination of Inclination' of bolt hole bearing face of s ide fa'ce
Unit: mm
Remark: Chamfering of the threaded portion of nut bearing face side . , s h a l l b e o f l . O t o 1 . 0 5 d i n d i a r n e t e r .
D e r ~ ~ n a r i o n ot screw
(4
M 12 --
M 16 . ---- -
M 20
M 22
M 24
M n
M 30
4 - b
H.X.
0.7
0.8
0.9
1.1
L2
1.3
1.5
dl,,.,
2 .
12
16
20
22
24
n
30
H B
E 1 k.F. 1 h M.X. ,
12 - 16
20
22
24
n
30
,= 22
-- 27
32
36
41
46
50
1'
D,
min.
20
25
29
33
38
43
47
c r-a.
25.4 -
31.2
37
41.6
47.3
53.1
57.7
7 -
f0.X
------
*0'4
r-.-
0 -U.B
---
-1
D
*-me
20
25
30
34
39
u
a
2- 0.4~ 0.8
Attached Table 3 . High Strength P l a i n Washers for Frict ion Grip Joints
Unit: mm
Remark: The f igures above show a plain w a s h e r with 45 O chamfer and that with radius r , and e i t h e r chamfer o r radius to be used i s optional.
DVSICI IDI I~ I~
12
16 -
20
22
24
n
D t c ,.I' r
&sic Tolerance A l ~ ~ r n . . d ~ ~ ~ ~ i o n 1 Tolnranee d,menlion
