4-1
SECTION 4
MAINTENANCE
M4 1.7 (15)* 2.2 (19)* 2.6 (23)* 3.4 (30)* 3.7 (33)* 4.8 (42)* 2.3 (20)*
M6 5.8 (51)* 7.6 (67)* 8.9 (79)* 12 (102)* 13 (115)* 17 (150)* 7.8 (69)*
M8 14 (124)* 18 (159)* 22 (195)* 28 (248)* 31 (274)* 40 (354)* 19 (169)*
M10 28 (21) 36 (27) 43 (32) 56 (41) 61 (45) 79 (58) 38 (28)
M12 49 (36) 63 (46) 75 (55) 97 (72) 107 (79) 138 (102) 66 (49)
M16 121 (89) 158 (117) 186 (137) 240 (177) 266 (196) 344 (254) 164 (121)
M20 237 (175) 307 (226) 375 (277) 485 (358) 519 (383) 671 (495) 330 (243)
M24 411 (303) 531 (392) 648 (478) 839 (619) 897 (662) 1160 (855) 572 (422)
NOTE: Torque values shown with * are inch pounds.
IDENTIFICATION
HEX CAP SCREW AND CARRIAGE BOLTS
CLASSES 5.6 AND UP
MANUFACTURER’S IDENTIFICATION
PROPERTY CLASS
HEX NUTS AND LOCKNUTS
CLASSES 05 AND UP
MANUFACTURER’S IDENTIFICATION
MINIMUM HARDWARE TIGHTENING TORQUES
IN NEWTON-METERS (FOOT POUNDS) FOR NORMAL ASSEMBLY APPLICATIONS
METRIC NON-FLANGED HARDWARE AND LOCKNUTS
SIZE UNPLATED PLATED UNPLATED PLATED UNPLATED PLATED W/CL8.8
W/ZnCr W/ZnCr W/ZnCr BOLT
CLASS 5.8 CLASS 8.8 CLASS 10.9
PROPERTY CLASS
LOCKNUT
CL.8
NOMINAL
CLOCK MARKING
86529681 REV F 5.1
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