Chevrolet Cruze manuals

Chevrolet Cruze Repair Manual: Metric Fasteners

This vehicle provides fastener dimensions using the metric system. Most metric fasteners are approximate in diameter to equivalent English fasteners. Make replacements using fasteners of the same nominal diameter, thread pitch, and strength.

A number marking identifies the OE metric fasteners except cross-recess head screws. The number also indicates the strength of the fastener material. A Posidrive or Type 1A cross-recess identifies a metric cross-recess screw. For best results, use a Type 1A cross-recess screwdriver, or equivalent, in Posidrive recess head screws.

GM Engineering Standards and North American Industries have adopted a portion of the ISO-defined standard metric fastener sizes. The purpose was to reduce the number of fastener sizes used while retaining the best thread qualities in each thread size. For example, the metric M6.0 X 1 screw, with nearly the same diameter and 25.4 threads per inch replaced the English 1/4-20 and 1/4-28 screws. The thread pitch is midway between the English coarse and fine thread pitches.

Fastener Strength Identification

  1. English Bolt, Grade 2 (Strength Class)
  2. English Bolt, Grade 5 (Strength Class)
  3. English Bolt, Grade 7 (Strength Class)
  4. English Bolt, Grade 8 (Strength Class)
  5. Metric Nut, Strength Class 9
  6. Metric Bolts, Strength Class Increases as Numbers Increase

The most commonly used metric fastener strength property classes are 9.8 and 10.9. The class identification is embossed on the head of each bolt. The English, inch strength classes range from grade 2 to grade 8. Radial lines are embossed on the head of each bolt in order to identify the strength class. The number of lines on the head of the bolt is 2 lines less than the actual grade. For example, a grade 8 bolt will have 6 radial lines on the bolt head. Some metric nuts are marked with a single digit strength identification number on the nut face.

The correct fasteners are available through GM SPO. Many metric fasteners available in the aftermarket parts channels are designed to metric standards of countries other than the United States, and may exhibit the following:

The metric fasteners on GM products are designed to new, international standards. The following are the common sizes and pitches, except for special applications:

Table 1: Metric Prevailing Torque Fastener Minimum Torque Development Table 2: English Prevailing Torque Fastener Minimum Torque Development ...

Prevailing Torque Fasteners
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 Thes ...

Other materials:

Steering Wheel and Column Description and Operation
The steering wheel and column has 4 primary functions: Vehicle steering Vehicle security Driver convenience Driver safety Vehicle Steering The steering wheel is the first link between the driver and the vehicle. The steering wheel is fastened to a steering shaft within the column. A ...

Installation Procedure
Cut the front hinge pillar body in corresponding locations to fit the remaining original panel. The sectioning joint should be trimmed to allow a gap of one-and-one-half-times the metal thickness at the sectioning joint. Create a 50 mm (2 in) backing plate from the unused portion of ...

Headlining Trim Panel Replacement (Without Sunroof)
Warning: Do not attempt to repair or alter the head impact energy-absorbing material glued to the headliner or to the garnish trims. If the material is damaged, replace the headliner and/or the garnish trim. Failure to do so could result in personal injury. Caution: If a vehicle is equip ...

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