Recommended Maximum Torque Values
Use the following torques when special torques are not listed
(Grade 2)
(Grade 5)
(Grade 6)
(Grade 8)*
Torque
Torque
Torque
Torq_ue
Inch (threads)
Ft Lbs (N.m)
Ft Lbs (N.m)
Ft Lbs (N.m)
Ft Lbs (N.m)
Size Lubricated
Lubricated
Lubricated
Lubricated
1/4 (20)
4 (5.4)
6 (8.1) 8 (10.8)
9 (12.2)
1/2 (28)
5 (6.8)
7 (9.5) 9 (i2.2)
11 (14.9)
5/16 (18) 8 (10.8) 13 (17.6) 16 (21.7)
18 (24.4)
5/6 (24)
10 (13.5) 15 (20.3)
18 (24.4)
21 (28.5)
3/8 (16)
15 (20.3)
24 (32.5)
29 (39.3)
34 (46)
3/8 (24)
17 (23) 27 (36.6)
33 (44.8)
38 (51.5)
7/16 (14)
25 (40) 38 (51.5)
47 (63.7)
54 (73.2)
7/16 (20)
27 (36.6)
42 (56.9) 52 (70.5)
60 (81.3)
1/2 (13)
38 (51.5) 58 (78.6) 72 (97.6)
82 (111.2)
1/2 (20)
42 (57) .65 (88.1)
80 (108.5) 90 (122)
9/16 (12)
54 (73) 84 (113.9)
105 (142.4) 120 (162.7)
9/16 (18) 60 (81.4) 93 (126.1)
115 (156)
132 (179)
5/8 (11)
71 (96) 115 (156) 145 (197)
165 (224)
5/8 (18)
81 (110) 130 (176) 160 (217)
185 (251)
3/4 (10)
125 (169) 205 (278)
250 (339) 290 (393)
3/4 (16)
140 (190) 230 (312) 280 (380)
320 (434)
7/8 (9)
108 (146) 305 (414) 405 (549)
455 (617)
7/8 (14)
120 (163) 335 (454) 450 (610)
515 (698)
1 (8)
163 (221) 455 (617)
610 (827) 695 (942)
1 (14)
178 (241) 510(691)
685 (929) 1785 (1064)
1-1/8 (7)
230 (312)
610 (827)
865 (1173)
990 (1342)
1-1/8 (12)
260 (353)
685 (929) 970 (1315) 1110 (1505)
1-1/4 (7)
325 (441) 860 (1166) 1225 (1661) 1400 (1898)
1-1/4 (12)
360 (488) 955 (1295) 1355 (1837) 1500 (2102)
1-3/8 (6)
425 (576) 1130 (1532) 1600 (2170) 1830 (2481)
1-3/8 (12)
480 (651) 1290 (1749) 1830 (2481) 2085 (2827)
1-1/2 (6)
565 (766) 1500 (2034) 2130 (2888) 2430 (3295)
1-1/2 (12)
635 (861) 1690 (2291) 2400 (3254) 2730 (3702)
1-3/4 (5)
765 (1037)
2370 (32.14) 3360 (4556)
3840 (5207)
2 (4.5)
1310 (1776)
3550 (4814) 5050 (9286)
5760 (7811)
NOTE: These values apply to fasteners as received from
·Thick Nuts must be used
the supplier, dry, or when lubricated with normal engine
with Grade 8 bolts.
oil. They do not apply if special graphited or moly-
disulphide greases or other extreme pressure lubricants
are used. This applies to both UNF and UNC threads.
M00105
Printed in U.S.A.
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