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Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public.

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“Invent a New India Using Knowledge”

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“Step Out From the Old to the New”

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“The Right to Information, The Right to Live”

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“Knowledge is such a treasure which cannot be stolen”

“Invent a New India Using Knowledge”

है”ह”ह

IS 204-2 (1992): Tower Bolts - Specification Part-2Non-Ferrous Metals [CED 15: Builder Hardware]

IS 204 ( Part 2) : 1992(Reaffirmed 2007)

2

( )

Indian Standard

TOWER BOLTS - SPECIFICATIONPART 2 NON-FERROUS METALS

( Fifth Revision)

Second Reprint JANUARY 2002

UDC 621·882.2 [669.2/.8]: 624·97

BIS 1992

BUREAU OF INDIAN STANDARDSMANAK BHAVAN. 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

February 1992 Price Group 3

AMENDMENT NO.1 OCTOBER 1993TO

IS 204 ( Part 2 ) : 1992 TOWER DOLTS­SPECIFICATION

PART 2 NON FERROUS METALS

( Fifth Revision)

(Page 4, clause 6.3 ) - Delete the clause.

AMENDMENT NO.3 JANUARY 2008T()

IS 204 (PART 2): 1992 TOWER BOLTS­SPECIFICATION

PART 2 NON-FERROUS METALS

( fIfth Revision)

(Page 2, Table I; and page 3, Table 2) - Insert the following Not.e at theend of both the tables:

'NOTE - The shapes given in the figures are only illustrative but the dimensions and minimum

requirements, wherespecifiedare binding. '

(CED 15)

Reprcgraphy Unit,BIS.NewDelhi,India

Al\1ENllMEN'I' NO. 2 ()CTOBER 1997TO

IS 204 ( Pr\RT 2) : 1992 TOW~=R BOLTS­SPECIFICATION

PART 2 NON-FERROUS METALS

( F~rth Revision )

(Page 2, Table 1, f"ig. ) - Substitute '16 ± 1mm' for ·16 mm'.

( Page 2, Table 1 ) -- Insert a IH~\\i figure as given b(~10\V before last figure:

. ,~ E +5mm .i

<. eEL) 15 )Rcprography Unit, DIS. Nl~W Dc.lhi. India

Bu ildc r '! Hardware Sectional Committee, CED 15

FOREWOltD

This Indian Standard ( Fifth Revision) was adopted by the Bureau of Indian Standards, after thedraft finalized by the Builders Hardware Sectional Committee had been approved by the CivilEngincer ing Division Council.

The specification for tower bolts was issued in 1950 and subsequently revised in 1961. 1966,1974 and 1978. The standard was bifurcated into two parts in the fourth revision (1918);Part I deals with ferrous metal tower bolts and Part 2 deals with non-ferrous metal tower bolts.

For the tower bolts made of non-ferrous metals, the length of bolt has been kept equal to thelength of the barrel and the size is denoted by the length of the barrel.

Also the diameter of the bore of the barrel and socket for the barrel tower bolts has beenspecified to suit the extrusions locally available.

This revision of the standard makes reference to the latest Indian Standards for various typesof materials specified herein. Consequently, it also indicates the designations for variousmaterials as per the latest versions of these standards.

This standard contains clauses S.I.1, 6.3 and 7.1 which permit the purchaser to use his optionfor select ion to suit his requirements.

In the formulation of this standard due weightage has been given to international co-ordinationamong the standards and practices prevailing in different countries in addition to relating it tothe practices in the field in this country.

For the purpose of deciding whether a particular requirement of this standard is complied with,the final value, observed or calculated, expressing the result of a test or analysis, shall berounded off in accordance with IS 2 : 1960 'Rules for rounding off numerical values ( revised )'.The number of significant places retained in the rounded off value should be the same asthat of the specified value in this standard.

IS 204 (Part 2 ) : 1992

Indian. Standard

TOWER BOLTS - SPECIFICATIONPART 2 NON·FERROUS METALS

( Fifth Revision)

2 REFERENCES

2.1 The Indian Standards listed in Annex Aare necessary adjuncts to this standard.

3 TYPES

3.1 Tower bolts shall be of the following types( see Tables 1 and 2 ):

1 SCOPE

141 The standard ( Part 2 ) lays down require­ments for tower bolts made of non-ferrousmetals.

a) Barrel Tower Bolts

Brass barrel tower bolts with castbrass barrel and rolled or cast brassbolts

2 Brass barrel tower bolts with barrelof extruded sections of brass andTolled or down brass

3 Brass barrel tower bol ts wi t h brasssheet barrel and rolled or drawnbrass bolt

4 Aluminium barrel tower bolts withbarrel and bolt of extruded sectionsof aluminium alloys

5 Zinc barrel tower bolts with barreland bolt of die-cast zinc alloy

b) Skeleton TOH'er Bolts

Brass skeleton tower bolts with cast 2brass plate and staples and rolled ordrawn brass bolt

7 Brass skeleton tower bolts wi t h 2staples and plate of extrudedsections of brass and rolled ordrawn brass bolt

8 Alurni nium skeleton tower bolts with 2pla ,e. staples and bolt of extrudedsections of aluminium alloy

9 Zinc skeleton tower bolts WIth plate 2staples and bolts of' die-cast zincalloy

4 MATERIAL

4.1 The material used for tower bolts shallcomply with the requirements given in Table 3.

5 MANUFACTURE

S.1 General

Tower bolts shall be well made and sha.I befree from defects. The" bolts shall be finishedto the correct shape and shall have a smoothaction. All tower bolts made with sheets1-2 rom thickness and abovc : shall havecountersunk screw holes to suit counter .sunkhead wood screw (see IS 6760: 1972). Allsharp edges and corners shall be removed andfinished smooth.

5.1.1 Tower bolts, wherever possible, shall haveknob integral with the bolt. In case it is notpossible to provide a single piece constructionof bolt, the knob may preferably be fitted 10the bolt with a pin or alternatively, screwedand riveted to the bolt and its shape may beround" half round, spherical or conical, ofrobust. construction as specified by thepurchaser.

5.2 Particulars

5.2.1 Barrel TOK'cr Bolts

Barrel made fro III sheet shall be properlypressed to shape, Cast barrel shall be frec fromcasting and other surface defects. Brass boltsha 11 be rnade fro m r0 11cd 0 r d raw 11 br as s rod ·Extruded sections of alumi nium alloy and brassshall be free from defects. Non-ferrous metaltower bolts shall each be provided with asmall spring and a ball on the inside of barrelto enable smooth working (one typicalillustration is shown in Table 1 ).

5.2.2 Skeleton TonIer Bolts

The staples and plate of non-ferrous metalshall be free from casting or other defects( one typical illustration is shown in Table 2 ).

6 DIMENSIONS6.1 The leading dimensions of barrel towerbolts and tolerances on them shall conform tothose given in Table 1.

TableDescriptionType

IS 104 ( Part 2 ) : 1992

Table 1 Barrel Tower Bolts, Types 1 to 5

i Clauses 3.1, 5.2.1 and 6.1 )

All dimens ions in millimetres.

SECTION XX

A OR B ..-----~

SeRE'I1 HOLES PRESSED

1G mm

-+0----- - ------ -- _._-

-SPRING AND BALL

F-H- F-II-CAST OR

EXTRUDED

Size Lengtb or Width of Dla ofBolt or Barrel, C Bolt DBarrel r-- -'"--~

(A or B) When WhenD-IO·O D=12·0

175 >- 32

200 200

2S0 2SO

300 300

l\flnimumNo. ofF.,quallySpacedHoles inBarrel &

Socket forWoodeDScrewNo.6(12)

!:I 6

J :8

8

10

10

Dia ofBore ofBarrel

orSocket

G

(10) (11)(9)

2-40 1 to ),25 0·7 to J-Smore thandia of bolt

(8)

J'60

(7)

i-si-s2-0

2·0

2·0

2·0

2·0

l~:: I

(6)

25

Length of Thickness of Metal of Barrel, FSocket E rr: .A..----_~

Brass Aluminium Alloy Sheetor r----"""-------. Brass

Zinc D==10·0 D= 12-0Alloy

or

12·0

10·038

(4)(3)

225

(2)(1 )

225

75 7~

100 100

12S 125

ISO ISO

Toler- +3anee -1 ::1:1 :1:1 :1:0-)

+0·5-0·2 ±0·25 ±0'2S ±O·lS

2

Tab

le2

Skel

eton

Tow

erB

olts

,T

ypes

6to

9(

Cla

uses

3.1,

5.2.

2an

d6.

2)

All

dim

ensi

on

sin

mll

lim

etre

s,

;.

G-;

:'--

.J:-

D

STA

PLE

S

1E

j-F

ll-

~~

PRES

SED

6~'

mm

~BOLT

J-

I.

~=~~

--===

4d==

====

t:;J

--"~~F

It

~--t

.;.-C

I_.

-L

FIr- :1- •

wC

AS

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REX

TRUD

EDS

ize

Leo

gtll

Len

gth

Wid

tho

fBo

ltD

isL

engt

ho

fT

hick

ness

of

Pla

teor

Soc

ket

FD

laof

Bor

eo

fD

I.o

rN

o.o

fof

Pla

teor

Sta

ple

of

Sta

ple

Er------J'

,P

late

orS

tapl

eS

haa

k0

fof

Bol

tB

olt

CB

olt

r-

A,

Bra

ssA

lum

iniu

mA

lloy

GK

nob

Sta

ples

AP

late

,-----.A----~

DW

hen

Whe

n,----"--~

or

Zin

cA

llo

yr

A----.

...~

BW

hen

Wh

enD

=lO

·OD

=1

2·0

Wh

enW

hen,---~

IW

hen

Wh

enW

hen

Wh

enD

=IO

·OD

=1

2·0

D=

lO·O

D=

12

·0W

hen

Wh

enD

=1

0·0

D=

12

'SD

=lO

·OD

=1

2·0

D=

lO·O

D=

12

'O

7~

7SO

900

·900

(1)

375

450

600

(2)

375

450

600

1 I

(3)

100

(4)

32·0

(5)

38·0

(6)

10·0 or 12·0

(7)

22·0

(~)

25·0

(9)

1·20

(10)

1·60

(11) 1·60

(12)

2·40

(13)

11·0

(14)

13·0

(15

)

s.o

(16) 6·0

(17) 3 4 4 S

·6

MiD

Jmum

No

.or

SC

rew

Hol

eslo

rW

oo

dS

crew

No.

4

(18) 10 12 12 14 18

.... rn i ,.....~ =~ N~

Tol

er­

ance

±1:1

:0·5

:1:0

·5±o

·s±

O-S

±O

·S+

0·2

S+

0·2

5+

0·25

+0

·25

±O

·S-0

-0

--0

-0

±0

·5:*

=0·5

+0·

5-0

+o·s

-0

... !

IS 204 ( Part 2 ) : 1992

6.2 The leading dimensions of skeleton tower 8 PACKINGbolts and tolerances on them shall conform tothose given in Table' 2. 8.1 Barrel tower bolts shall be suitably packed

in cartons. Each carton shall bear a label6.3 The tower .bolts may be supplied in sizes showing the name of the manufacturer orand dimensi ons and shapes other than those trade-mark, type size and quantity of bolts.specified in relevant tables of dimensions and Aluminium tower bolts shall be individuallywhere so agreed between the manufacturer wrapped with tissue paper or polythene film.and the purchaser. 8.2 Skeleton tower bolts of non-ferrous metal7 l'INISH shall be suitably packed and the aluminium

alloy bolts shall be individually wrapped with7.1 Unless otherwise specified the bolts shall tissue paper or polythenc film. Each packet orhave finish as given below: carton shall bear a label showing the name of

a) Barrel Tower Bolts the manufacturer or trade-mark, type, size andquantity of tower bolts.

1) Brass towet bolts (Types 1 10 J ) -- Boltand barrel polished or plated as specified . 9 SCALE OF SAMPLING AND CRITERIAby the purchaser. FOR CONFORMITY

2) Aluminium alloy tower bolts ( Type 4 ) _ 9.1 LotBolts and barrel anodized. The anodic In any consignment, all the tower holts, of thefilm may be either 'transpa.rent or dyed 'same type and manufactured at the same time,as specified by the purchaser. The quality shall be grouped together to constitute ~ Jot.of anodized finish shall not be less thanGrade AC 10 of IS 1868 : 1"982. 9.2 Sample Size

3) Zinc a/loy tower bolts. (Type.5) .'- Bolt The number of tower bolts, to be selectedand barrel oxidized, bronze-d: or plated 'from a lot, shall depend upon the size of theas specified by the purchaser. lot and shall be in accordance with col 1 and

2 of Table 4.b) Skeleton Tower Bolts9.2.1 These tower bolts shall be: selected at

1) Brass skeleton tower bolts (Types 6 and 7)--- random from at least 10 percent of the packetsBolt, plate and staples bright finished. subject to a minimum of three, equal number

2) Aluminium alloy skeleton tower bolts of tower bolts being selected from each such(Type 8) - Bolt, plate and staples packet.anodized. The anodic film may be eithertransparent or dyed as specified by the 9.3 Testspurchaser. The quality of anodised All the tower bolts selected as in 9.2 shall befinish shall not be less than Grade AC checked for dimensional requirements (see 6 )10 of IS ]868 : 1982. and for finish ( see 7). Any tower bolt which

3) Zinc a/Joy skeleton tower bolts ( Type 9)- fails to satisfy the requirements of dimensionsBolt, plate and staples oxidized, bronzed or finish or both shall be considered as aor plated as specified by the purchaser. defective bolt.

Table 3 Requirements for Materials for Tower Bolts

( Clauses 4.1 and 9.5 )

SI No.

( 1)

i)

ii)iii)

iv)v)

vi)

~Iaterial

(2)

Aluminium alloy tubesAluminium alloy extruded rodsBrass sheetsCast brassExtruded brassZinc base alloy die casting

Suitable Grade in Indian Standards(3)

Designation 63400 WP or 63400 P of IS 1285 : 1975

Des ignation 65032 WP of IS 733 : 1983Alloy designation CuZn 40 Condition HD of IS 410 : 1977Grade CB.2 of IS 292 : 1983 'Type 11, Half hard condition of IS 319 : 1974Alloy Zn A14, Die casting of IS 742 : 1981

4

IS 204 ( Part 2 ) : 1992

--------------------

Table 4 Scale or Sampling and Criterionfor Conformity

( Clauses 9.2 and 9.4 )

9.4 Criteria for Conformity

A 101 shall be considered as conforming to therequirements of this standard if the number ofdefective bolts among those inspected does notexceed the corresponding number given in col3 of Table 4; otherwise it shall he considered a~

not conforming to the requirements of thisstandard.

9.5 For conformity to the requirements of thematerials themanufacturcT shall provide acertificate of compliance to the requirementsof corresponding Indian Standar-' ( see col 4 inTable 3 ).

10 MARKING

10.1 Each tower bolt shall be cl ear lv markedwith the name of manufacturer or trade-mark.

10.1.1 The tower bolt may also be marked withthe Standard Mark.

(1)

Up to 200

201 to 300

301 to 500

501 to 800

801 and above

Sample Sizc.~ Permissible Numberof DefectiveTower Bolts

(2) (3)

15 0

20

30 2

40 2

55 3

ANNEX A

( Clause 2.1 )I ..IST O:F REl~~ERRED STANDARDS

IS No.292 : 1983

319 : 1974

410 : 1981

733 : 1983

TitleLeaded brass ingots andcast ings ( second revision)Free-cut ling brass, bars, rodsand sections ( third revision)

Cold rolled brass sheet, stripand foil ( third revision)

Wrought aluminium anda lumin ium ~1.1l0V bars, rods,a nd sections "' (for generalengineering purpose~) (thirdrevision )

5

IS No.

742 : 1981

1285 : 1975

1868 : 1982

6760 : 1972

Title

Zinc base alloy die castings( second revision)Wrought aluminium andaluminium alloy, extrudedround tube and hollow sections( for general engineeringpurposes ) ( second revision)Anodic. coatings on aluminiumand its alloy ( second revision)Slot ted countersunk head woodscrews

Bureau of Indian Standards

BIS is a statutory institution established under the Bureau of Indian Standards ACI. J986 to promoteharmonious development of the activities of standardization, marking and quality certification of goodsand attending to connected matters in the country.

Copyright

HIS has the copyright of all its publications. No part of these publications may be reproduced in any formwithout the prior permission in writing of BIS. This docs not preclude the free use, in the courseof implementing the standard, of necessary details, such as symbols and sizes, type or gradedesignations. Enquiries relating to copyright be addressed to the Director (Publications), BIS.

Review of Indian Standards

Amendments are issued to standards as the need arises on the basis of comments, Standards arc also reviewedperiodically; a standard along with amendments is reaffirmed when such review indicates that no changes areneeded; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standardsshould ascertain that they arc in possession of the latest amendments or edition by referring to the latest issue of~RrS Catalogue' and 'Standards: Monthly Additions',

l~hjs Indian Standard has been developed from Doc: No. CED 15 ( 5013 )

Amendments Issued Since Publication

Amend No. Date of Issue Text Affected

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