Flat washer (A4-316) to BS4320 Form A
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Standard : BS4320 Form A
Material : A4-316 stainless steel or Nylon
 
Bolt Size
OD (mm)
ID (mm)
t (mm)
Weight (kg) in A4-316 per hundred
M5
10.0
5.3
1.0
0.044
M6
12.5
6.4
1.6
0.115
M8
17.0
8.4
1.6
0.216
M10
21.0
10.5
2.0
0.413
M12
24.0
13.0
2.5
0.634
M14
28.0
15.0
2.6
0.870
M16
30.0
17.0
3.0
1.144
M20
37.0
21.0
3.0
1.741
M24
44.0
25.0
4.0
3.271
M27
50.0
28.0
4.0
4.283
M30
56.0
31.0
4.0
5.428
M33
60.0
34.0
5.0
7.635
M36
66.0
37.0
5.0
9.316
M39
72.0
40.0
6.0
13.482