Strength Contrast of Screw and Nut

Strength Contrast of Screw and Nut

Unit: N-m

Size of Nut Size of Screw Class Level
(B) (d1) 4.6 6.8 8.8 10.9 12.9
4.5mm M2 0.12 0.238 0.319 0.447 0.536
5mm M2.5 0.245 0.487 0.65 0.915 1.1
5.5mm M3 0.434 0.87 1.16 1.63 1.96
6mm M3.5 0.683 1.37 1.82 2.56 3.08
7mm M4 1.01 2.02 2.7 3.79 4.54
8mm M5 2.04 4.09 5.47 7.67 9.18
10mm M6 3.47 6.97 9.27 13 15.6
11mm M7 5.85 11.6 15.5 21.8 26.2
13mm M8 8.41 16.9 22.5 31.6 37.9
17mm M10 16.7 33.4 44.5 62.6 75.2
19mm M12 29.1 58.3 77.6 109 131
22mm M14 46.4 92.7 124 174 209
24mm M16 72.3 145 194 271 325
27mm M18 100 199 266 373 447
30mm M20 141 282 376 529 635
32mm M22 192 384 511 720 865
36mm M24 244 488 650 915 1100
41mm M27 358 713 951 1340 1610
46mm M30 484 971 1290 1820 2180
50mm M33 661 1320 1760 2470 2970
55mm M36 848 1690 2260 3180 4020
60mm M39 1100 2190 2920 4110 4930
65mm M42 1350 2710 3610 5080 6080
70mm M45 1700 3400 4540 6370 7630
75mm M48 2030 4060 5440 7620 9120
80mm M52 2640 5290 7040 9880 11800
85mm M56 3270 6560 8710 12300 14800
90mm M60 4080 8180 10900 15300 18300
95mm M64 4930 9890 13100 18500 22300
100mm M68 5970 12000 16000 22500 27000
105mm M72 7150 14400 19100 26900 32300
110mm M76 8540 17000 22700 31900 38300
115mm M80 10000 20000 26600 37500 45000
  • Note:
  • (1) Class 4.6 and 6.8 are for DIY use.
  • (2) Class 8.8 is for general use.
  • (3) Class 10.9 is for pneumatic and professional use.
  • (4) Class 12.9 is for industrial use.