Inch (Sae) And Metric Fasteners; Introduction - prime mover smx45 Master Service Manual

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Inch (SAE) and Metric Fasteners

1. Introduction

Threaded fasteners such as bolts, nuts, cap screws, and
studs are made to specifications that describe mechanical
strength and hardness of fastener. A fastener used in a
design application is selected in accordance with its
specifications. Parts used on this truck are purchased from
many countries. Many fasteners are similar but cannot be
used as direct replacements.
Service technicians must use replacement fasteners that
have the same specifications. Fasteners made to each
specification have identification marks for that specification.
This specification is commonly called "grade" for SAE
standards and "property" for metric standards. This section
describes identification of some common fasteners.
The metric system used is described as SI (International
System of Units, also called SI in all languages.) The SI
system of measurement is described in ISO Standard 1000,
1973.
Master Service Manual 2004-01-12
F-code
PT
Inch (SAE) and Metric Fasteners
Version no T-code
001 SMX
5 9 10
5 9 10
Section C-code
M1.1
39