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GENERAL INFORMATION
MINIMUM HARDWARE TIGHTENING TORQUES
IN FOOT POUNDS (NEWTON-METERS) FOR NORMAL ASSEMBLY APPLICATIONS
METRIC HARDWARE AND LOCKNUTS
NOTE: Torque values shown with * are inch pounds.
IDENTIFICATION
HEX DCAP SCREW AND CARRIAGE BOLTS
CLSSES 5.6 AND UP
MANUFACTURER’S IDENTIFICATION
HEX NUTS AND LOCKNUTS
CLASSES 05 AND UP
PROPERTY CLASS
PROPERTY CLASS
CLOCK MARKING
MANUFACTURER’S IDENTIFICATION
CLASS 5.8 CLASS 8.8 CLASS 10.9 LOCKNUT
NOMINAL CL.8
SIZE UNPLATED PLATED UNPLATED PLATED UNPLATED PLATED W/CL8.8
W/ZnCr W/ZnCr W/ZnCr BOLT
M4 15*(1.7) 19*(2.2) 23*(2.6) 30*(3.4) 33*(3.7) 42*(4.8) 16*(1.8)
M6 51*(5.8) 67*(7.6) 79*(8.9) 102*(12) 115*(13) 150*(17) 56*(6.3)
M8 124*(14) 159*(18) 195*(22) 248*(28) 274*(31) 354*(40) 133*(15)
M10 21 (28) 27 (36) 32 (43) 41 (56) 45 (61) 58 (79) 22 (30)
M12 36 (49) 46 (63) 55 (75) 72 (97) 79 (107) 102 (138) 39 (53)
M16 89 (121) 117 (158) 137 (186) 177 (240) 196 (266) 254 (344) 97 (131)
M20 175 (237) 226 (307) 277 (375) 358 (485) 383 (519) 495 (671) 195 (265)
M24 303 (411) 392 (531) 478 (648) 619 (839) 662 (897) 855 (1160) 338 (458)
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