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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 931 Specifications
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DIN 931 Specifications
DIN 931
Specifications
All measurements in millimeters (mm)
d1
b to 125
b to 200
b over 200
k
e
s
M4
14
-
-
2.8
7.66
7
M5
16
-
-
3.5
8.79
8
M6
18
24
-
4
11.05
10
M8
22
28
-
5.3
14.38
13
M10
26
32
45
6.4
18.9
17
M12
30
36
49
7.5
21.1
19
M14
34
40
53
8.8
24.49
22
M16
38
44
57
10
26.75
24
M18
42
48
61
11.5
30.14
27
M20
46
52
65
12.5
33.53
30
M22
50
56
69
14
35.72
32
M24
54
60
73
15
39.98
36
M27
60
66
79
17
45.2
41
M30
66
72
85
18.7
50.85
46
M33
72
78
91
21
55.37
50
M36
78
84
97
22.5
60.79
55
M42
90
96
109
26
71.3
65
M45
96
102
115
28
76.95
70
M48
102
108
121
30
82.60
75
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