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Table 4.1 Bolt length and Nut tightening torque
*1: 1[N
･m] is 0.7376 [ft･lbf].
ANSI class 150
Machine Bolts
Meter size
P.C.S
Diameter
Length
[inch]
Tightening
torque
[N･m] *1
15mm 1/2” 4 1/2” 2” 7 to 9
25mm 1” 4 1/2” 2.16” 14 to 17
32mm 1
1/4” 4 1/2” 2.16” 19 to 24
40mm 1
1/2” 4 1/2” 2.36” 16 to 21
50mm 2” 4 5/8” 2.56” 37 to 46
65mm 2
1/2” 4 5/8” 2.95” 52 to 66
80mm 3” 4 5/8” 2.95” 55 to 69
100mm 4” 8 5/8” 2.95” 40 to 51
125mm 5” 8 3/4” 3.15” 68 to 85
150mm 6” 8 3/4” 3.15” 89 to 112
200mm 8” 8 3/4” 3.54” 119 to 149
250mm 10” 12 7/8” 3.86” 159 to 198
300mm 12” 12 7/8” 3.94” 183 to 229
350mm 14” 12 1” 4.33” 203 to 254
400mm 16” 16 1” 4.53” 232 to 289
450mm 18” 16 1 1/8” 4.92” 322 to 402
500mm 20” 20 1 1/8” 5.12” 336 to 420
600mm 24” 20 1 1/4” 5.70” 497 to 622