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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)
38 690 01 Rev. --
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)
101.7 (75)
135.6 (100)
149.5 (110)
189.8 (140)
199.3 (147)
271.2 (200)
Property Class
5.8
1.7 (15)
2.9 (26)
3.2 (28)
5.8 (51)
5.7 (50)
9.9 (88)
13.6 (120)
24.4 (216)
27.1 (20)
47.5 (35)
47.5 (35)
82.7 (61)
76.4 (56)
131.5 (97)
Torque Conversions
N·m = in. lb. x 0.113
N·m = ft. lb. x 1.356
KohlerPower.com
Grade 5
2.8 (25)
4.5 (40)
4.5 (40)
13.0 (115)
15.8 (140)
28.3 (250)
30.5 (270)
—
—
—
47.5 (35)
54.2 (40)
74.6 (55)
101.7 (75)
108.5 (80)
142.4 (105)
169.5 (125)
223.7 (165)
244.1 (180)
311.9 (230)
332.2 (245)
440.7 (325)
8.8
10.9
4.1 (36)
8.1 (72)
14.0 (124)
33.9 (300)
66.4 (49)
116.6 (86)
184.4 (136)
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
—
—
—
18.7 (165)
22.6 (200)
39.6 (350)
—
—
—
40.7 (30)
67.8 (50)
81.4 (60)
108.5 (80)
142.5 (105)
155.9 (115)
223.7 (165)
237.3 (175)
311.9 (230)
352.6 (260)
447.5 (330)
474.6 (350)
637.3 (470)
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)
—
17.0 (150)
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
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)
5
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