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▣ Hexagon Socket Button Head Screws Unit : mm
Thread Size d M1.6 M2 M2.6
M2.5
M3 M4 M5 M6 M8 M10 M12 (M14) M16
Thread Pitch p 0.35 0.4 0.45 0.5 0.7 0.8 1 1.25 1.5 1.75 2 2
S Nominal 0.7 0.9 1.3 1.5 2.0 2.5 3.0 4.0 5.0 6.0 6.0 8.0
Min. 0.711 0.889 1.27 1.52 2.02 2.52 3.02 4.02 5.02 6.02 6.02 8.025
Max. 0.724 0.902 1.295 1.545 2.045 2.56 3.08 1.095 5.095 6.095 6.095 8.115
e          Min. 0.803 1.003 1.427 1.73 2.30 2.30 3.44 4.58 5.72 6.86 6.86 9.15
df          ~ Minor Thread Diameter
t Min. Shallow 0.7 0.8 1.2 1.2 1.5 2 2 3 4 4.8 5.6 6.4
Deep 1.4 1.6 2 2 2.5 3 3.5 5 6 8 9 10
S
c
r
e
w

E
n
d
Flat Point dp Max. 0.8 1.0 2.0 2.0 2.5 3.5 4.0 5.5 7.0 8.5 10 12.0
Min. 0.55 0.75 1.75 1.75 2.25 3.2 3.7 5.2 6.64 8.14 9.64 11.57
Oval Point r ~   2 2.5 2.5 3 4 5 7 9 11 13 15
Dog Point dp Max. 0.8 1 1.5 2 2.5 3.5 4 5.5 7 8.5 10 12
Min. 0.55 0.75 1.25 1.75 2.25 3.2 3.7 5.2 6.64 8.14 9.64 11.57
Z Short 0.4 0.5 0.63 0.75 1 1.25 1.5 2 2.5 3 3.5 4
Long 0.8 1 1.25 1.2 2 2.5 3 4 5 6 7 8
Cone Point dt Max. 0.16 0.2 0.25 0.3 0.4 0.5 1.5 2.0 2.5 6.0 4 4
Min. (1) 0.9 1.4 1.9 2.4 3.25 3.25
Cup Point dv Max. 0.8 1 1.2 1.4 2 2.5 3 5 6 8 9 10
Min. 0.55 0.75 0.95 1.15 1.75 2.25 2.75 4.7 5.7 7.64 8.64 9.64
(1) In this range, a small flat face or roundness is provided at the end.