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  • M3
  • M4
  • M5
  • M6
  • M8
  • M10
  • M12
  • (M14)
  • M16
  • M20

19

  • 20
  • 25
  • 30
GB 5784 - 1986 Hexagon Head Bolts - Reduced Shank - Product Grade B
Thread Size
d
M3
P Pitch
b L≤125
125<L≤200
da max
dw min
e min
k Nominal Size
min
max
k1 min
s max
min
x max
r min
0.5
12
-
3.6
4.4
5.98
2
1.8
2.2
1.3
5.5
5.2
1.25
0.1
thousand-piece steel weight≈kg
1.28
Thread Lengthb
12