Fastener Identification - Chrysler 1998 Voyager Service Manual

4 INTRODUCTION
GENERAL INFORMATION (Continued)
INTERNATIONAL VEHICLE CONTROL AND DISPLAY
SYMBOLS INTERNATIONAL VEHICLE CONTROL
AND DISPLAY SYMBOLS
The graphic symbols illustrated in the following
chart (Fig. 4) are used to identify various instrument
controls. The symbols correspond to the controls and
displays that are located on the instrument panel.

FASTENER IDENTIFICATION

FASTENER IDENTIFICATION
THREAD IDENTIFICATION
SAE and metric bolt/nut threads are not the same.
The difference is described in the Thread Notation
chart (Fig. 5).
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
INTERNATIONAL CONTROL AND DISPLAY SYMBOLS
Fig. 4
Fig. 5 Thread Notation—SAE and Metric
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 nut face. Refer to the
Fastener Identification and Fastener Strength Charts.
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