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(Non-preferred) dimensions in parentheses.

Metric Hexagon Socket Countersunk Head Screws

BS 4168-8 - 1982

Display drawing:

英标BS 4168-8 - 1982 BS4168-8 4168-8BS Metric Hexagon Socket Countersunk Head Screws
Screw Thread
d
M3 M4 M5 M6 M8 M10 M12 (M14) M16 M20
P Pitch
b ref.
dk theoretical sharp max
actual max
min
k max
s Nominal Size
max
min
t min
0.5 0.7 0.8 1 1.25 1.5 1.75 2 2 2.5
18 20 22 24 28 32 36 40 44 52
6.72 8.96 11.20 13.44 17.92 22.40 26.88 30.24 33.60 40.32
6 8 10 12 16 20 24 27 30 36
5.82 7.78 9.78 11.73 15.73 19.67 23.67 26.67 29.67 35.61
1.86 2.48 3.1 3.72 4.96 6.2 7.44 8.12 8.8 10.16
2 2.5 3 4 5 6 8 10 10 12
2.045 2.56 3.08 4.095 5.095 6.095 8.115 10.115 10.115 12.142
2.020 2.52 3.02 4.02 5.02 6.02 8.025 10.025 10.025 12.032
1.05 1.49 1.86 2.16 2.85 3.6 4.35 4.65 4.89 5.45

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