GMC Chevrolet Camaro 1998 Service Manual page 28

0-16 General Information
Prevailing Torque Fasteners
2 3
4
5
6 7
8
9
171892
Legend
(1) Prevailing Torque Nut, Center Lock Type
(2) Prevailing Torque Nut, Top Lock Type
(3) Prevailing Torque Nut, Nylon Patch Type
General Information
(4) Prevailing Torque Nut, Nylon Washer
Insert Type
(5) Prevailing Torque Nut, Nylon Insert Type
(6) Prevailing Torque Bolt, Dry Adhesive
Coating Type
(7) Prevailing Torque Bolt, Thread Profile
Deformed Type
(8) Prevailing Torque Bolt, Nylon Strip Type
(9) Prevailing Torque Bolt, Out-of-Round Thread
Area Type
A prevailing torque nut is designed to develop an
interface between the nut and bolt threads. Distortion
of the top of a metal nut or using a nylon patch on
the threads in the middle of the hex flat causes
that interface.
A prevailing torque bolt/nut that is clean and free of
rust can be reused as follows. If there is any
doubt, replace the fastener:
1. Clean away all dirt or foreign material.
2. Inspect the fastener for signs of overtightening.
3. Handstart the fastener at the original location.
4 .. Inspect the fastener for torque development,
referring to the table below.
5. Tighten the fastener within specifications.
Metric-Size Fasteners
Component
Size (in mm)
N·m
Lbin
6 0.4 4
6.3 0.4 4
8 0.6 7
10 1.4 12
Nuts and All Metal Bolts/Screws
12 2.2 18
14 3.0 27
16 4.2 37
20 7.0 82
6
0.4 4
6.3 0.4 4
8 0.6 5
10 1.2 11
Adhesive or Nylon Coated Bolts/Screws
12 1.6 14
14 2.4 21
16 3.4 30
20 5.6 50
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