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GB /T 31.3-1988 Hexagon bolts with split pin hole on shank-fine pitch thread


Unit: mm
国标GB /T31.3-1988 GB31.3 31.3GB(GB31-1976 细牙六角头螺杆带孔螺栓
Screw Thread
d
M8 M10 M12 (M14) M16 (M18) M20 (M22) M24 (M27) M30 M36 M42 M48
P Pitch
b L≤125
125<L≤200
200<L
ds max=nominal size
min
k max
min
s max=nominal size
min
Lh max
min
d1 max
min
1 1.25 1.5 1.5 1.5 2 2 2 2 2 2 3 3 3
22 26 30 34 38 42 46 50 54 60 66 / / /
28 32 39 40 44 48 52 56 60 66 72 84 96 108
41 45 49 57 57 61 65 69 73 79 85 97 109 121
8 10 12 14 16 18 20 22 24 27 30 36 42 48
7.64 9.64 9.64 13.54 15.57 17.57 17.57 21.48 23.48 26.48 29.48 35.38 41.38 47.38
5.54 6.69 6.69 9.09 10.29 11.85 11.85 14.35 15.35 17.35 19.12 22.92 26.42 30.42
5.06 6.11 6.11 8.51 9.71 11.15 11.15 13.65 14.65 16.65 18.28 22.08 25.58 29.58
13 16 18 21 24 27 30 34 36 41 46 55 65 75
12.57 15.57 17.57 20.16 23.16 26.16 29.16 33 35 40 45 53.8 63.1 73.1
4.3 4.3 4.3 5.3 6.3 6.3 6.3 7.36 7.36 8.36 9.36 10.36 12.43 12.43
4 4 4 5 6 6 6 7 7 8 9 10 12 12
2.25 2.75 3.5 3.5 4.3 4.3 4.3 5.3 5.3 5.3 6.66 6.66 8.36 8.36
2 2.5 3.2 3.2 4 4 4 5 5 5 6.3 6.3 8 8
Relevant Standards
1
六角头螺杆带孔螺栓
[GB]
GB /T 31.1-1988
Hexagon bolts with split pin hole on shank Suppliers(1)
2
细杆六角头螺杆带孔螺栓
[GB]
GB /T 31.2-1988
Hexagon bolts with split pin hole on shank-reduced shank
3
小六角头螺杆带孔螺栓
[GB]
GB 23-1976
Bolts, small hexagon head with hole through the shank
4
小六角头螺杆带孔导颈螺栓
[GB]
GB 24-1976
Bolts, small hexagon head with fit neck and hole through the shank
5
六角头螺杆带孔螺栓
[GB]
GB /T 31.1-2013
Hexagon bolts with split pin hole on shank
6
精制美制六角头杆部带孔螺钉
[BS]
BS 1768-1963
Unified hexagon head bolts, washer faced