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GENERAL TORQUE VALUES
English Fastener Torque Recommendations for Standard Applications
Bolts, Screws, Nuts and Fasteners Assembled Into Cast Iron or Steel
Size
Tightening Torque: N·m (in. lb.) ± 20%
8-32
10-24
10-32
1/4-20
1/4-28
5/16-18
5/16-24
3/8-16
3/8-24
Tightening Torque: N·m (ft. lb.) ± 20%
5/16-24
3/8-16
3/8-24
7/16-14
7/16-20
1/2-13
1/2-20
9/16-12
9/16-18
5/8-11
5/8-18
3/4-10
3/4-16
Metric Fastener Torque Recommendations for Standard Applications
Size
4.8
Tightening Torque: N·m (in. lb.) ± 10%
M4
1.2 (11)
M5
2.5 (22)
M6
4.3 (38)
M8
10.5 (93)
Tightening Torque: N·m (ft. lb.) ± 10%
M10
21.7 (16)
M12
36.6 (27)
M14
58.3 (43)
66 690 14 Rev. A
Grade 2
2.3 (20)
3.6 (32)
3.6 (32)
7.9 (70)
9.6 (85)
17.0 (150)
18.7 (165)
29.4 (260)
33.9 (300)
—
—
—
47.5 (35)
61.0 (45)
67.8 (50)
94.9 (70)
142.4 (105)
101.7 (75)
169.5 (125)
135.6 (100)
223.7 (165)
149.5 (110)
244.1 (180)
189.8 (140)
311.9 (230)
199.3 (147)
332.2 (245)
271.2 (200)
440.7 (325)
Property Class
5.8
1.7 (15)
3.2 (28)
5.7 (50)
13.6 (120)
24.4 (216)
27.1 (20)
47.5 (35)
47.5 (35)
82.7 (61)
76.4 (56)
131.5 (97)
N·m = in. lb. x 0.113
N·m = ft. lb. x 1.356
KohlerEngines.com
Grade 5
2.8 (25)
4.5 (40)
4.5 (40)
13.0 (115)
18.7 (165)
15.8 (140)
22.6 (200)
28.3 (250)
39.6 (350)
30.5 (270)
—
—
—
47.5 (35)
54.2 (40)
74.6 (55)
108.5 (80)
101.7 (75)
142.5 (105)
108.5 (80)
155.9 (115)
223.7 (165)
237.3 (175)
311.9 (230)
352.6 (260)
447.5 (330)
474.6 (350)
637.3 (470)
8.8
10.9
2.9 (26)
4.1 (36)
5.8 (51)
8.1 (72)
9.9 (88)
14.0 (124)
33.9 (300)
66.4 (49)
116.6 (86)
184.4 (136)
Torque Conversions
in. lb. = N·m x 8.85
ft. lb. = N·m x 0.737
Specifi cations
Grade 2 or 5 Fasteners
Into Aluminum
Grade 8
—
—
—
17.0 (150)
—
—
—
40.7 (30)
67.8 (50)
81.4 (60)
12.9
5.0 (44)
9.7 (86)
16.5 (146)
40.7 (360)
81.4 (60)
139.7 (103)
219.7 (162)
2.3 (20)
3.6 (32)
—
7.9 (70)
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Noncritical
Fasteners
Into Aluminum
2.0 (18)
4.0 (35)
6.8 (60)
17.0 (150)
33.9 (25)
61.0 (45)
94.9 (70)
17
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