TABLE 1-5. Screw Sizes and Dimensions
TABLE 1-6. Drill and Auger Bit Sizes or Wood Screws
are two to four times the diameter of the bolt in
b. Type of bolts (fig. 1-19).
length. In each type of carriage bolt the upper part of
(1) Carriage bolts. Carriage bolts fall
the shank, immediately below the head, is designed
into three categories within the Army supply system:
to grip the material in which the bolt is inserted and
bolt, finned neck; bolt, ribbed neck; and bolt, square
keep the bolt from turning when a nut is tightened
neck. These bolts have round heads that are not
down on it and/or removed. The finned type is
designed to be wrench driven. They are threaded
designed with two or more fins extending
only part of the way up the shaft; usually the threads
1-24
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