(3) Adjustable wrenches.
{a) Singe open end wrench. The single open end adjustable wrench (fig
10) is similar in shape to the fixed end nonadjustable open end wrench, but has one
adjustable jaw and one stationary jaw. The adjustable end wrenches issued have 1-
3/8- to 2-7/8-inch jaw openings and are 24 inches long. A knurled nut is rotated
to bring the movable jaw up to fit the nut or bolthead.
Figure 10.
Adjustable wrenches.
(b) Auto and monkey wrenches. The auto and monkey wrenches (fig 10) are
similar in design. They are of sturdy construction and are made to fit a wide
range of nuts and bolts. They are designed principally for turning odd sized nuts
or bolts which the open end, box, or socket wrenches will not fit and when work
requires a sturdy wrench. They are supplied in several sizes from 5 to 21 inches
long.
(c) Clamp pliers and vise grip wrench. The clamp pliers and vise grip
wrench (fig 10) has one movable jaw and one stationary jaw. The movable jaw is
adjusted by an adjusting screw in the base of the stationary jaw handle. The
movable jaw can be clamped around a nut or bolt after setting the jaw to the de
sired size. This type wrench is issued in two sizes: 1-1/8-inch jaw opening
capacity and 7 inches long and 1-1/4-inch capacity and 10 inches long.
(4) Pipe wrenches.
(a) Adjustable pipe wrench. The adjustable pipe wrench (fig 10) has two
jaws that are not parallel. The outer jaw, which is adjustable, is made with a
small amount of play which provides a tight grip on the pipe when the wrench is
turned in the direction of the movable jaw. This is the only wrench which will
take a bite on round objects. The jaw always leaves marks on the work and should
never be used on nuts or bolts unless the corners have been rounded so that you
cannot turn it with another type of wrench.
10
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