OPERATION AND SERVICE INFORMATION
Page 28
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HARDWARE
Periodically, the vehicle should be inspected for loose
fasteners. Fasteners should be tightened in accordance
with the Torque Specifications table (Ref Fig. 47 on
page 28).
Use care when tightening fasteners and refer to the
Technician’s Repair and Service Manual for specific
torque values.
Generally, three grades of hardware are used in the
vehicle. Grade 5 hardware can be identified by the
three marks on the hexagonal head and grade 8 hard-
ware is identified by 6 marks on the head. Unmarked
hardware is Grade 2 (Ref Fig. 47 on page 28).
Fig. 47 Torque Specifications and Bolt Grades
BOLT SIZE
Grade 2
1/4"
5/16"
3/8"
7/16"
1/2"
9/16"
5/8"
3/4"
7/8"
1"
4
(5)
8
(11)
15
(20)
24
(33)
35
(47)
55
(75)
75
(102)
130
(176)
125
(169)
190
(258)
Grade 5
Grade 8
6
(8)
13
(18)
23
(31)
35
(47)
55
(75)
80
(108)
110
(149)
200
(271)
320
(434)
480
(651)
6
(8)
18
(24)
35
(47)
55
(75)
80
(108)
110
(149)
170
(230)
280
(380)
460
(624)
680
(922)
BOLT SIZE
Class 5.8
(Grade 2)
M4
M5
M6
M8
M10
M12
M14
1
(2)
2
(3)
4
(6)
10
(14)
20
(27)
35
(47)
55
(76.4)
Class 8.8
(Grade 5)
2
(3)
4
(6)
7
(10)
18
(24)
35
(47)
61
(83)
97
(131)
Class 10.9
(Grade 8)
3
(4)
6
(8)
10
(14)
25
(34)
49
(66)
86
(117)
136
(184)
5.8
8.8
10.9
ALL TORQUE VALUES ARE IN FT. LBS. (Nm)
Unless otherwise noted in text, tighten all hardware in accordance with this chart.
This chart specifies ‘lubricated’ torque figures. Fasteners that are plated or lubricated when
installed are considered ‘wet’ and require approximately 80% of the torque required for ‘dry’ fasteners.
