Precision Measuring Tools - Arctic Cat Cougar Service Manual

GENERAL INFORMATION
American fasteners are normally described by
diameter, threads per inch and length. For exam-
ple, 3/8-16 x 2 indicates a bolt 3/8 inch in diame-
ter with 16 threads per inch, 2 inches long. The
measurement across two flats on the head of the
bolt or screw indicates the proper wrench size to
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be used. Figure 13 shows how to determine bolt
diameter.
NOTE
If
purchasing a bolt from a dealer or
parts store, you must know how to spec-
ify bolt length. Correctly measure bolt
length by measuring the length starting
from underneath the bolt head to the end
of the bolt (Figure 17).
Machine Screws
There are many different types of machine
screws. Figure 18 shows a number of screw
heads requiring different types of turning tools.
Heads are also designed to protrude above the
metal (round) or to be slightly recessed in the
metal (flat). See Figure 19.
Bolts
Commonly called bolts, the technical name
for these types of fasteners is cap screw. Metric
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OPENING FOR TURNING TOOLS
Slotted Phillips Allen Internal torx External torx
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