GMC chervolet camaro 1999 Service Manual page 22

General Information
Prevailing Torque Fasteners
1
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
(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
General Information 0-19
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 the use of a nylon
patch on the threads in the middle of the hex flat
provides the interface.
A prevailing torque bolt/nut that is clean and free of
rust can be reused as follows:
1 . Clean away all dirt or foreign material.
2. Inspect the fastener for signs of overtightening.
3. Hand start the fastener at the original location.
4. Inspect the fastener for torque development,
referring to the table below.
5. Tighten the fastener within specifications.