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 00 - 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
00-11
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)