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Unit:mm

Hex Bolt for Pipe Flange Connection - PN Designated

GB /T 9125.1 - 2020

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国标GB /T9125.1 - 2020 GB9125.1 9125.1GB Hex Bolt for Pipe Flange Connection - PN Designated
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 *Models with different eras.

Thread Size
d
M10 M12 M14 M16 M20 M24 M27 M30
P Pitch
b L≤125
125＜L≤200
L＞200
c max
min
da max
ds max=nominal size
Grade A min
Grade B min
dw Grade A min
Grade B min
e Grade A min
Grade B min
L1 max
k Nominal Size
Grade A max
min
Grade B max
min
k1 Grade A min
Grade B min
r min
s max=nominal size
Grade A min
Grade B min
1.5 1.75 2 2 2.5 3 3 3.5
26 30 34 38 46 54 60 66
32 36 40 44 52 60 66 72
45 49 53 57 65 73 79 85
0.6 0.6 0.6 0.8 0.8 0.8 0.8 0.8
0.15 0.15 0.15 0.2 0.2 0.2 0.2 0.2
11.2 13.7 15.7 17.7 22.4 26.4 30.4 33.4
10 12 14 16 20 24 27 30
9.78 11.73 13.73 15.73 19.67 23.67 / /
9.64 11.57 13.57 15.57 19.48 23.48 26.48 29.48
14.63 16.63 19.64 22.49 28.19 33.61 / /
14.47 16.47 19.15 22 27.7 33.25 38 42.75
17.77 20.03 23.36 26.75 33.53 39.98 / /
17.59 19.85 22.78 26.17 32.95 39.55 45.2 50.85
2 3 3 3 4 4 6 6
6.4 7.5 8.8 10 12.5 15 17 18.7
6.58 7.68 8.98 10.18 12.715 15.215 / /
6.22 7.32 8.62 9.82 12.285 14.785 / /
6.69 7.79 9.09 10.29 12.85 15.35 17.35 19.12
6.11 7.21 8.51 9.71 12.15 14.65 16.65 18.28
4.35 5.12 6.03 6.87 8.6 10.35 / /
4.28 5.05 5.96 6.8 8.51 10.26 11.66 12.8
0.4 0.6 0.6 0.6 0.8 0.8 1 1
16 18 21 24 30 36 41 46
15.73 17.73 20.67 23.67 29.67 35.38 / /
15.57 17.57 20.16 23.16 29.16 35 40 45
Thread Size
d
M33 M36 M39 M42 M45 M48 M52 M56
P Pitch
b L≤125
125＜L≤200
L＞200
c max
min
da max
ds max=nominal size
Grade A min
Grade B min
dw Grade A min
Grade B min
e Grade A min
Grade B min
L1 max
k Nominal Size
Grade A max
min
Grade B max
min
k1 Grade A min
Grade B min
r min
s max=nominal size
Grade A min
Grade B min
3.5 3 3 3 3 3 4 4
/ / / / / / / /
78 84 90 96 102 108 116 /
91 97 103 109 115 121 129 137
0.8 0.8 1 1 1 1 1 1
0.2 0.2 0.3 0.3 0.3 0.3 0.3 0.3
36.4 39.4 42.4 45.6 48.6 52.6 56.6 63
33 36 39 42 45 48 52 56
/ / / / / / / /
32.38 35.38 38.38 41.38 44.38 47.38 51.26 55.26
/ / / / / / / /
46.55 51.11 55.86 59.95 64.7 69.45 74.2 78.66
/ / / / / / / /
55.37 60.79 66.44 71.3 76.95 82.6 88.25 93.56
6 6 6 8 8 10 10 12
21 22.5 25 26 28 30 33 35
/ / / / / / / /
/ / / / / / / /
21.42 22.92 25.42 26.42 28.42 30.42 33.5 35.5
20.58 22.08 24.58 25.58 27.58 29.58 32.5 34.5
/ / / / / / / /
14.41 15.46 17.21 17.91 19.31 20.71 22.75 24.15
1 1 1 1.2 1.2 1.6 1.6 2
50 55 60 65 70 75 80 85
/ / / / / / / /
49 53.8 58.8 63.1 68.1 73.1 78.1 82.8

Alternative history

GB /T 9125 - 2003 GB /T 9125 - 2010 GB /T 9125.1PN - 2020
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