SPECIFICATIONS
TP-6901 3/16a Specifications 47
8.5 STANDARD TORQUE SPECIFICATIONS
1. The torque values above are general guidelines. Always use the torque values specified in the service
manuals and/or assembly drawings when they differ from above torque values.
2. The torque values above are based on new plated threads. Increase torque values by 15% if non-plated
threads are used.
3. Hardware threaded into aluminum must have either two diameters of thread engagement or a 30% or more
reduction in the torque to prevent stripped threads.
4. Torque values are calculated as equivalent stress loading on American hardware with an approximate preload
of 90% of the yield strength and a friction coefficient of 0.125.
American Standard Fasteners Torque Specifications
Size
Torque
Measurement
Assembled into Cast Iron or Steel Assembled into
Aluminum Grade
2 or 5Grade 2 Grade 5 Grade 8
8-32 N•m (in.lb.) 1.8 (16) 2.3 (20) —
See Note 3
10-24 N•m (in.lb.) 2.9 (26) 3.6 (32) —
10-32 N•m (in.lb.) 2.9 (26) 3.6 (32) —
1/4-20 N•m (in.lb.) 6.8 (60) 10.8 (96) 14.9 (132)
1/4-28 N•m (in.lb.) 8.1 (72)) 12.2 (108) 16.3 (144)
5/16-18 N•m (in.lb.) 13.6 (120) 21.7 (192) 29.8 (264)
5/16-24 N•m (in.lb.) 14.9 (132) 23.1 (204) 32.5 (288)
3/8-16 N•m (ft.lb.) 24.0 (18) 38.0 (28) 53.0 (39)
3/8-24 N•m (ft.lb.) 27.0 (20) 42.0 (31) 60.0 (44)
7/16-14 N•m (ft.lb.) 39.0 (29) 60.0 (44) 85.0 (63)
7/16-20 N•m (ft.lb.) 43.0 (32) 68.0 (50) 95.0 (70)
1/2-13 N•m (ft.lb.) 60.0 (44) 92.0 (68) 130.0 (96)
1/2-20 N•m (ft.lb.) 66.0 (49) 103.0 (76) 146.0 (108)
9/16-12 N•m (ft.lb.) 81.0 (60) 133.0 (98) 187.0 (138)
9/16-18 N•m (ft.lb.) 91.0 (67) 148.0 (109) 209.0 (154)
5/8-11 N•m (ft.lb.) 113.0 (83) 183.0 (135) 259.0 (191)
5/8-18 N•m (ft.lb.) 128.0 (94) 208.0 (153) 293.0 (216)
3/4-10 N•m (ft.lb.) 199.0 (147) 325.0 (240) 458.0 (338)
3/4-16 N•m (ft.lb.) 222.0 (164) 363.0 (268) 513.0 (378)
1-8 N•m (ft.lb.) 259.0 (191) 721.0 (532) 1109.0 (818)
1-12 N•m (ft.lb.) 283.0 (209) 789.0 (582) 1214.0 (895)
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