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Home
About Us
Products
Hex Bolts
Socket Head Cap Screws
Socket Set Screws
Socket Countersunk Screws
Socket Button Head Screws
Hex Key Wrench
Nylock Nuts, Cap / Doom Nuts
Prevailing Torque Nuts
Hex Nuts / Special Nuts
Flange Nuts, Wing Nuts
Square Weld Nuts & Hex Weld Nuts
Cage Nuts, Rivet Nuts
Self Tapping Screws
Spring Washers, Plain Washers
Spring Dowell Pins
Circlips
Blind Rivets
Technical Info
Alliances
Services
Enquiry Now
Contact Us
DIN 137b Specifications
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DIN 137b Specifications
DIN 137b
Specifications
All measurements in millimeters (mm)
d1
used for
d2
s
3.2
M3
8
0.5
3.7
M3.5
8
0.5
4.3
M4
9
0.5
5.3
M5
11
0.5
6.4
M6
12
0.5
7.4
M7
14
0.8
8.4
M8
15
0.8
10.5
M10
21
1
13
M12
24
1.2
15
M14
28
1.6
17
M16
30
1.6
19
M18
34
1.6
21
M20
36
1.6
23
M22
40
1.8
25
M24
44
1.8
28
M27
50
2
31
M30
56
2.2
34
M33
60
2.2
37
M36
68
2.5
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