IMPORTANT: Grade 8 regular hex zinc-yellow plated
capscrews and cadmium- and wax-coated prevailing
torque locknuts may be tightened to a lower torque
value than the grade 8 regular hex fasteners de-
scribed in
. See
for torque values for
grade 8 regular hex zinc-yellow plated capscrews
and cadmium- and wax-coated prevailing torque
locknuts.
Torque Values for U.S. Customary Thread Fasteners With Lubricated
*
or Plated Threads
†
Thread
Diameter–
Pitch
Regular Hex
Flanged
Grade 5
Bolt
Grade 5 or
B Nut
Grade 8 or
8.2 Bolt
Grade 8 or
C Nut
Grade 5
Bolt
Grade B
Nut
Grade 8 or
8.2 Bolt
Grade G
Nut
Torque: lbf·ft (N·m)
Torque: lbf·ft (N·m)
Torque: lbf·ft (N·m)
Torque: lbf·ft (N·m)
1/4–20
f230002
f230003
f230004
f230005
f230006
f230007
f230008
f230009
7 (9)
8 (11)
6 (8)
10 (14)
1/4–28
8 (11)
9 (12)
7 (9)
12 (16)
5/16–18
15 (20)
16 (22)
13 (18)
21 (28)
5/16–24
16 (22)
17 (23)
14 (19)
23 (31)
3/8–16
26 (35)
28 (38)
23 (31)
37 (50)
3/8–24
30 (41)
32 (43)
25 (34)
42 (57)
7/16–14
42 (57)
45 (61)
35 (47)
60 (81)
7/16–20
47 (64)
50 (68)
40 (54)
66 (89)
1/2–13
64 (87)
68 (92)
55 (75)
91 (123)
1/2–20
72 (98)
77 (104)
65 (88)
102 (138)
9/16–12
92 (125)
98 (133)
80 (108)
130 (176)
9/16–18
103 (140)
110 (149)
90 (122)
146 (198)
5/8–11
128 (173)
136 (184)
110 (149)
180 (244)
5/8–18
145 (197)
154 (209)
130 (176)
204 (277)
3/4–10
226 (306)
241 (327)
200 (271)
320 (434)
3/4–16
253 (343)
269 (365)
220 (298)
357 (484)
7/8–9
365 (495)
388 (526)
320 (434)
515 (698)
7/8–14
402 (545)
427 (579)
350 (475)
568 (770)
1–8
—
582 (789)
—
—
1–12
—
637 (863)
—
—
1–14
—
652 (884)
—
—
*
Freightliner recommends that all plated and unplated fasteners be coated with oil before installation.
†
Use these torque values if either the bolt or nut is lubricated or plated (zinc-phosphate conversion-coated, cadmium-plated, or waxed).
Table 3, Torque Values for U.S. Customary Thread Fasteners With Lubricated or Plated Threads
General Information
00
Torque Specifications Tables: 00–13
School Bus Chassis Maintenance Manual, October 2005
00/15
