New Holland TC21D Operator's Manual page 22

MINIMUM HARDWARE TIGHTENING TORQUES
IN FOOT POUNDS (NEWTON-METERS) FOR NORMAL ASSEMBLY APPLICATIONS
METRIC HARDWARE AND LOCKNUTS
CLASS 5.8
NOMINAL
SIZE UNPLATED
M4 15* (1.7)
M6 51* (5.8)
M8 124* (14)
M10 21 (28)
M12 36 (49)
M16 89 (121)
M20 175 (237)
M24 303 (411)
NOTE: Torque values shown with * are inch pounds.
SECTION 1 - GENERAL INFORMATION
CLASS 8.8
PLATED UNPLATED
W/ZnCr
19* (2.2) 23* (2.6)
67* (7.6) 79* (8.9)
159* (18) 195* (22)
27 (36) 32 (43)
46 (63) 55 (75)
117 (158) 137 (186)
226 (307) 277 (375)
392 (531) 478 (648)
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
PROPERTY CLASS
1-3
CLASS 10.9
PLATED UNPLATED
W/ZnCr
30* (3.4) 33* (3.7)
102* (12) 115* (13)
248* (28) 274* (31)
41 (56) 45 (61)
72 (97) 79 (107)
177 (240) 196 (266)
358 (485) 383 (519)
619 (839) 662 (897)
CLOCK MARKING
LOCKNUT
CL.8
PLATED W/CL8.8
W/ZnCr BOLT
42* (4.8) 16* (1.8)
150* (17) 56* (6.3)
354* (40) 133* (15)
58 (79) 22 (30)
102 (138) 39 (53)
254 (344) 97 (131)
495 (671) 195 (265)
855 (1160) 338 (458)