Current model Isuzu vehicles are primarily dimensioned in the metric system. Many of the fasteners used on Isuzu vehicles are metric, but are very close in dimension to well-known inch system fasteners. Replace fasteners with those of the same nominal diameter, thread pitch, and strength.

Original equipment metric fasteners (except beauty bolts, like exposed bumper bolts and cross-recess head screws) are identified by a marking or a number which indicates the strength of the material in the fastener.

Metric cross-recess screws are identified as either Posidriv or Type 1A. Either Posidriv® or Type 1A cross-recess screwdrivers can be used in Posidriv® recess screw heads. However, Type 1A cross-recess screwdrivers perform better.

Prevailing torque fasteners create a thread interface between the fastener and the fastener counterpart in order to prevent the fastener from loosening.

All Metal Prevailing Torque Fasteners

These fasteners accomplish the thread interface by a designed distortion or deformation in the fastener.

Nylon Interface Prevailing Torque Fasteners

These fasteners accomplish the thread interface by the presence of a nylon material on the fastener threads.

Adhesive Coated Fasteners

These fasteners accomplish the thread interface by the presence of a thread-locking compound on the fastener threads. Refer to the appropriate repair procedure in order to determine if the fastener may be reused and the applicable thread-locking compound to apply to the fastener.