Operation CHARM: Car repair manuals for everyone.

Fastener Identification

PROWLER FASTENERS
Different assortment of special coated fasteners are used on the Prowler. The coated fasteners protect against galvanic corrosion. All fasteners should be replaced with OEM or equivalent fasteners.

Fig. 3 Thread Notation - SAE and Metric:






THREAD IDENTIFICATION
SAE and metric bolt/nut threads are not the same. The difference is described in the Thread Notation chart.

GRADE/CLASS IDENTIFICATION
The SAE bolt strength grades range from grade 2 to grade 8. The higher the grade number, the greater the bolt strength. Identification is determined by the line marks on the top of each bolt head. The actual bolt strength grade corresponds to the number of line marks plus 2. The most commonly used metric bolt strength' classes are 9.8 and 12.9. The metric strength class identification number is imprinted on the head of the bolt. The higher the class number, the greater the bolt strength. Some metric nuts are imprinted with a single-digit strength class on the