Engine Manual

TP-7095 4/18 49
6.5 Standard Torque Specifications
American Standard Fasteners Torque Specifications
Size
Torque
Measurement
Assembled into Cast Iron or Steel
Assembled into
Aluminum Grade 2
or 5
Grade 2
Grade 5
Grade 8
8-32
Nm (in. lb.)
1.8 (16)
2.3 (20)
-
See Note 3
10-24
Nm (in. lb.)
2.9 (26)
3.6 (32)
-
10-32
Nm (in. lb.)
2.9 (26)
3.6 (32)
-
1/4-20
Nm (in. lb.)
6.8 (60)
10.8 (96)
14.9 (132)
1/4-28
Nm (in. lb.)
8.1 (72)
12.2 (108)
16.3 (144)
5/16-18
Nm (in. lb.)
13.6 (120)
21.7 (192)
29.8 (264)
5/16-24
Nm (in. lb.)
14.9 (132)
23.1 (204)
32.5 (288)
3/8-16
Nm (ft. lb.)
24.0 (18)
38.0 (28)
53.0 (39)
3/8-24
Nm (ft. lb.)
27.0 (20)
42.0 (31)
60.0 (44)
7/16-14
Nm (ft. lb.)
39.0 (29)
60.0 (44)
85.0 (63)
7/16-20
Nm (ft. lb.)
43.0 (32)
68.0 (50)
95.0 (70)
1/2-13
Nm (ft. lb.)
60.0 (44)
92.0 (68)
130.0 (96)
1/2-20
Nm (ft. lb.)
66.0 (49)
103.0 (76)
146.0 (108)
9/16-12
Nm (ft. lb.)
81.0 (60)
133.0 (98)
187.0 (138)
9/16-18
Nm (ft. lb.)
91.0 (67)
148.0 (109)
209.0 (154)
5/8-11
Nm (ft. lb.)
113.0 (83)
183.0 (135)
259.0 (191)
5/8-18
Nm (ft. lb.)
128.0 (94)
208.0 (153)
293.0 (216)
3/4-10
Nm (ft. lb.)
199.0 (147)
325.0 (240)
458.0 (338)
3/4-16
Nm (ft. lb.)
222.0 (164)
363.0 (268)
513.0 (378)
1-8
Nm (ft. lb.)
259.0 (191)
721.0 (532)
1109.0 (818)
1-12
Nm (ft. lb.)
283.0 (209)
789.0 (582)
1214.0 (895)
Metric Fasteners Torque Specifications
Size
Torque
Measurement
Assembled into Cast Iron or Steel
Assembled into
Aluminum Grade 5.8
or 8.8
Grade 5.8
Grade 8.8
Grade 10.9
M6 x 1.00
Nm (ft. lb.)
6.2 (4.6)
12 (9)
13.6 (10)
See Note 3
M8 x 1.25
Nm (ft. lb.)
15.0 (11)
29.6 (22)
33.0 (24)
M8 x 1.00
Nm (ft. lb.)
16.0 (11)
24.0 (18)
34.0 (25)
M10 x 1.50
Nm (ft. lb.)
30.0 (22)
52.5 (39)
65.0 (48)
M10 x 1.25
Nm (ft. lb.)
31.0 (23)
47.0 (35)
68.0 (50)
M12 x 1.75
Nm (ft. lb.)
53.0 (39)
80.0 (59)
115.0 (85)
M12 x 1.50
Nm (ft. lb.)
56.0 (41)
85.0 (63)
122.0 (90)
M14 x 2.00
Nm (ft. lb.)
83.0 (61)
135.0 (100)
180.0 (133)
M14 x 1.50
Nm (ft. lb.)
87.0 (64)
133.0 (98)
190.0 (140)
M16 x 2.00
Nm (ft. lb.)
127.0 (94)
194.0 (143)
278.0 (205)
M16 x 1.50
Nm (ft. lb.)
132.0 (97)
201.0 (148)
287.0 (212)
M18 x 2.50
Nm (ft. lb.)
179.0 (132)
273.0 (201)
390.0 (288)
M18 x 1.50
Nm (ft. lb.)
189.0 (140)
289.0 (213)
413.0 (305)
Note:
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.
The torque values above are based on new plated threads. Increase torque values by 15% if non-plated threads are
used.
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.
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.