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Metric 120°Countersunk Head Square Neck Bolts

BS 4933 - 1973

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英标BS 4933 - 1973 BS4933 4933BS Metric 120°Countersunk Head Square Neck Bolts
Screw Thread
d
M5 M6 M8 M10 M12 M16 M20 M24
P Pitch
ds max
min
dk max
min
k max
min
s max
min
0.8 1 1.25 1.5 1.75 2 2.5 3
5.48 6.48 8.58 10.58 12.7 16.7 20.84 24.84
4.52 5.52 7.42 9.42 11.3 15.3 19.16 23.16
11.25 13.5 18 22.5 27 36 45 54
8.65 10.38 13.84 17.3 20.76 27.68 34.6 41.52
4.25 4.75 6.25 7.9 9.4 12.1 15.1 17.6
3.5 4 5.5 7 8.5 11 14 16.5
5.48 6.48 8.58 10.58 12.7 16.7 20.84 24.84
4.52 5.52 7.42 9.42 11.3 15.3 19.16 23.16
①,if L≤125mm时,then b=2d+6;
if 125<L≤200mm时,then b=2d+12;
if L>200mm时,then b=2d+25;
②,Standard nominal lengths are not specified in this standard, it may however, as a result of experience of usage,be possible to include these details at a future revision.

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