GB /T 1228 - 2006 High Strength Bolts with Large Hexagon Head for Steel Structures


Unit: mm
Nominal Length L Tips:seclect Nominal Length L and get Weight Thread length.
Screw Thread
d
M12 M16 M20 (M22) M24 (M27) M30
P Pitch
c max
min
da max
ds max
min
dw min
e min
k Nominal Size
max
min
k1 min
r min
s max
min
1.75 2 2.5 2.5 3 3 3.5
0.8 0.8 0.8 0.8 0.8 0.8 0.8
0.4 0.4 0.4 0.4 0.4 0.4 0.4
15.23 19.23 24.32 26.32 28.32 32.84 35.84
12.43 16.43 20.52 22.52 24.52 27.84 30.84
11.57 15.57 19.48 21.48 23.48 26.16 29.16
19.2 24.9 31.4 33.3 38.0 42.8 46.5
22.78 29.56 37.29 39.55 45.2 50.85 55.37
7.5 10 12.5 14 15 17 18.7
7.95 10.75 13.4 14.9 15.9 17.9 19.75
7.05 9.25 11.6 13.1 14.1 16.1 17.65
4.9 6.5 8.1 9.2 9.9 11.3 12.4
1.0 1.0 1.5 1.5 1.5 2.0 2.0
21 27 34 36 41 46 50
20.16 26.16 33 35 40 45 49
Weight of per 1000 steel products(≈kg)
- - - - - - -
Length of Thread b
- - - - - - -
Alternative history
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