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Click Specification

Unit:mm

Metric 90°Countersunk Square Bolts

BS 4933 - 1973

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英标BS 4933 - 1973 BS4933 4933BS Metric 90°Countersunk Square 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
10 12 16 20 24 32 40 48
8.5 10.2 13.6 17 20.4 27.2 34 40.8
4.75 5.75 7.9 9.4 10.9 14.1 18.1 21.3
4 5 7 8.5 10 13 17 20
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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