GB /T 18230.4 - 2000 Large hex nuts for structural bolting with large width across flats -type 1


Unit: mm
Thread Size
D
(M12) M16 M20 (M22) M24 (M27) M30 M36
P Pitch
da max
min
dw min
e min
m max
min
mw min
c max
min
s max
min
Nominal stress area of standard test mandrel,mm2
Ensure the load(N) 6H or 6AZ
1.75 2 2.5 2.5 3 3 3.5 4
13 17.3 21.6 23.8 25.9 29.1 32.4 38.9
12 16 20 22 24 27 30 36
19.2 24.9 31.4 33.3 38 42.8 46.5 55.9
22.78 29.56 37.29 39.55 45.2 50.85 55.37 66.44
10.8 14.8 18 19.4 21.5 23.8 25.6 31
10.37 14.1 16.9 18.1 20.2 22.5 24.3 29.4
8.3 11.28 13.52 14.48 16.16 18 19.44 23.52
0.6 0.8 0.8 0.8 0.8 0.8 0.8 0.8
0.15 0.2 0.2 0.2 0.2 0.2 0.2 0.2
21 27 34 36 41 46 50 60
20.16 26.16 33 35 40 45 49 58.8
84.3 157 245 303 353 459 561 817
97800 182100 284200 351500 409500 532400 650800 947700
Alternative history
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