High Tensile Structural Bolts & Nuts - Non-Preloaded 8.8
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Non-Preloaded
Thread size d M12 M16 M20 M24 M30 M36
p pitch of thread 1.75 2 2.5 3 3.5 4
a max. 5.25 6 7.5 9 10.5 12
cmax. 0.6 0.8 0.8 0.8 0.8 0.8
min. 0.15 0.2 0.2 0.2 0.2 0.2
da max. 13.7 17.7 22.4 26.4 33.4 39.4
dw min. 17.4 22.5 27.7 33.2 42.7 51.1
e min. 21.1 26.75 32.95 39.55 50.85 60.79
k
nom. 7.5 10 12.5 15 18.7 22.5
max. 7.68 10.18 12.85 15.35 19.12 22.92
min. 7.32 9.82 12.15 14.65 18.28 22.08
r min. 0.6 0.6 0.8 0.8 1 1
s nom. max. 19 24 30 36 46 55
min. 18.67 23.67 29.16 35 45 53.8
Dimensions apply prior to coating
The table shows popular diameters, other diameters can be supplied provided the quantity is suffi cient to warrant manufacture.
Fully Threaded Bolts / Setscrews & Standard Thread Bolts
General Requirements BS 4190
Threads BS 3643 Parts 1 & 2 tolerance class 6g
Materials & Manufacture BS EN ISO 898-1 Property Classes 8.8
Mechanical Properties BS EN ISO 898-1 Property Classes 8.8
Dimensions & Tolerances DIN 933 (Setscrews) & DIN 931 (Bolts)
Finish / Coatings
Self Colour / Black BS 4190 - as processed
Zinc Electroplated BS 7371-3 or BS EN ISO 4042
Hot Dip Galvanized BS 729 & BS 7371 Part 6
Product Marking BS EN ISO 898-1
All dimensions are in millimetres
High Tensile Structural Bolts & Nuts- Non-Preloaded 8.8
Issue: 2Date: 01/09/07Approved: M.R. TiddyPage: 1 of 6
Dimensions of Fully Threaded Bolts / Setscrews Characteristic Standard
Nominal Length mmTolerance
Over Up to and including
30 50 ± 1.25
50 80 ± 1.5
80 120 ± 1.75
120 180 ± 2
180 250 ± 2.3
Tolerance on nominal length for Fully Threaded Bolts / Setscrews and Standard Thread Bolts
Certifi cation
Property Class 8.8 for Fully Threaded Bolts / Setscrews and Standard Thread Bolts are supplied with a Test Certifi cate
All dimensions are in millimetres
High Tensile Structural Bolts & Nuts- Non-Preloaded 8.8
Issue: 2Date: 01/09/07Approved: M.R. TiddyPage: 2 of 6
Head Marking
M16
50
8.8
Fully Threaded Bolts / SetscrewsFully Threaded Bolts / SetscrewsThe actual arrangement of the marking may
vary from that shown
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All dimensions are in millimetres
High Tensile Structural Bolts & Nuts- Non-Preloaded 8.8
Issue: 2Date: 01/09/07Approved: M.R. TiddyPage: 3 of 6
Proof Load, Ultimate Tensile Load & Hardness of bolts
Nominal Dia, & Thread Pitch
Stress Area
Property Class 8.8
Proof Loadmin
Tensile Loadmin
Hardness Rockwell HRC
mm2 kN kN min max
M12 x 1.75 84.3 50.7 70 23 34
M16 x 2 157 94.5 130 23 34
M20 x 2.5 245 147 203 23 34
M24 x 3 353 212 293 23 34
M30 x 3.5 561 337 466 23 34
M36 x 4 817 490 678 23 34
Thread size d M12 M16 M20 M24 M30 M36
p pitch of thread 1.75 2 2.5 3 3.5 4
b1) 30 38 46 54 66 78
2) 36 44 52 60 72 84
3) 49 57 65 73 85 97
cmax. 0.6 0.8 0.8 0.8 0.8 0.8
min. 0.15 0.2 0.2 0.2 0.2 0.2
da max. 13.7 17.7 22.4 26.4 33.4 39.4
dsmax. 12 16 20 24 30 36
min. 11.73 15.73 19.48 23.48 29.48 35.38
dw min. 17.4 22.5 27.7 33.2 42.7 51.1
e min. 21.1 26.75 32.95 39.55 50.85 60.79
knom. 7.5 10 12.5 15 18.7 22.5
max. 7.68 10.18 12.85 15.35 19.12 22.92
min. 7.32 9.82 12.15 14.65 18.28 22.08
r min. 0.6 0.6 0.8 0.8 1 1
s nom. max. 19 24 30 36 46 55
min. 18.67 23.67 29.16 35 45 53.8
1) for l < 125mm
2) for l > 125mm < 200mm
3) for l > 200mm
Dimensions apply prior to coating
The table shows popular diameters, other diameters can be supplied provided the quantity is suffi cient to warrant manufacture.
Dimensions of Standard Thread Bolts
BoltProperty Class & Finish
supplied withNut
Property Class & Finish
8.8 - Self Colour 8 - Self Colour
8.8 - Zinc Electroplated 8 - Zinc Electroplated
8.8 - Hot Dip Galvanized 10 - Hot Dip Galvanized
Bolt and Nut combinations supplied
Certifi cation
Property Class 8.8 for Fully Threaded Bolts / Setscrews and Standard Thread Bolts are supplied with a Test Certifi cate
All dimensions are in millimetres
High Tensile Structural Bolts & Nuts- Non-Preloaded 8.8
Issue: 2Date: 01/09/07Approved: M.R. TiddyPage: 4 of 6
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M
8.8
Standard Thread BoltsThe actual arrangement of the marking may
vary from that shown
Thread size d M12 M16 M20 M24 M30 M36
p pitch of thread 1.75 2 2.5 3 3.5 4
damax. 13 17.3 21.6 25.9 32.4 38.9
min. 12 16 20 24 30 36
dw min. 17.2 22.2 28.2 33.2 42.7 51.1
e min. 21.1 26.75 32.95 39.55 50.85 60.79
mmax. = nom 10 13 16 19 24 29
min. 9.64 12.3 14.9 17.7 22.7 27.4
smax. = nom 19 24 30 36 46 55
min. 18.67 23.67 29.16 35 45 53.8
Dimensions apply prior to coating
Nuts
General Requirements BS 4190
ThreadsSelf Colour / Zinc Electroplated BS 3643 Parts 1 & 2 tolerance class 6H
Hot Dip Galvanized BS 3643 Parts 1 & 2 tolerance class 6H + 0.4mm
Materials & Manufacture BS 4190 Property Classes 8 & 10
Mechanical Properties
Self Colour / Zinc Electroplated BS 4190 Property Class 8
Hot Dip Galvanized DIN 267 Part 10 Property Class 10
Dimensions & Tolerances DIN 934
Finish / Coatings
Self Colour / Black BS 4190 - as processed
Zinc Electroplated BS 7371-3 or BS EN ISO 4042
Hot Dip Galvanized BS 729 & BS 7371 Part 6
Product Marking BS 4190
All dimensions are in millimetres
High Tensile Structural Bolts & Nuts- Non-Preloaded 8.8
Issue: 2Date: 01/09/07Approved: M.R. TiddyPage: 5 of 6
Dimensions of Nuts Characteristic Standard
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Proof Load of Nuts
Nominal Dia, & Thread Pitch
Stress Area
Proof Loads min
Property Class 8 Standard 6H fi t1
Property Class 10 Overtapped
6H + 0.40mm fi t2
mm2 kN kN
M12 x 1.75 84.3 67 78.1M16 x 2 157 125 150M20 x 2.5 245 196 236M24 x 3 353 282 342M30 x 3.5 561 448 551M36 x 4 817 653 8081 Nut fi nish self colour or zinc electroplated2 Nut fi nish hot dip galvanized
Nominal size of bolt or screw
BS 4320 Form ‘E’ DIN 125
Inside Diameter
d1
Outside Diameter
d2
Thickness
s
Inside Diameter
d1
Outside Diameter
d2
Thickness
s
max min max min max min max min max min max min
M12 14.5 14 24 23.2 2.8 2.2 13.43 13 24 23.48 2.7 2.3
M16 18.5 18 30 29.2 3.6 2.4 17.43 17 30 29.48 3.3 2.7
M20 22.6 22 37 35.8 3.6 2.4 21.52 21 37 36.38 3.3 2.7
M24 26.6 26 44 42.8 4.6 3.4 25.52 25 44 43.38 4.3 3.7
M30 33.8 33 56 54.5 4.6 3.4 31.62 31 56 55.26 4.3 3.7
M36 39.8 39 66 64.5 6.0 4.0 37.62 37 66 65.26 5.6 4.4
Dimensions apply prior to coating
Either BS 4320 Form ‘E’ washers or DIN 125 washers may be supplied depending on availability
Washers
General Requirements BS 4320 Section 2 Normal Diameter (Form E)
Materials & Manufacture BS 4320 Section 2
Dimensions & Tolerances BS 4320 Section 2 (Form E) or DIN 125
Finish / Coatings
Self Colour / Black BS 4190 - as processed
Zinc Electroplated BS 7371-3 or BS EN ISO 4042
Hot Dip Galvanized BS 729 & BS 7371 Part 6
All dimensions are in millimetres
High Tensile Structural Bolts & Nuts- Non-Preloaded 8.8
Issue: 2Date: 01/09/07Approved: M.R. TiddyPage: 6 of 6
Dimensions of Washers
Characteristic Standard
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Whilst this information is provided in good faith, no member of the Andaray group of companies shall be under any responsibility or liability in respect of errors or information that is found to be incorrect or for any relience the user may place on it.