USE/CARS OF HANDTOOLS & MEASURING TOOLS - OD1621 - LESSON 2/TASK 1
(h) Plug Wrenches.
A plug wrench (figure 20) is a straight bar
having a hexagon or square shape and is available in a range of sizes from
3/8 to 1 inch in width. They are usually 2 inches long. Plug wrenches are
also made to fit drain plugs of transmissions, differentials, and all types
of gear cases.
The multiple plug wrench is a combination type, having
several different size and shape ends. Most plug wrenches are made for a
specific size plug. There are single-end plug wrenches which range in size
from 3/16 to 11/16 inch with a hexagonal or square end.
wrenches with square ends are issued for 3/8 and 1/2 inch plugs and 3/8 and
3/4 inch plugs. These wrenches are normally 8 to 12 inches long. Socket
plug wrenches have a 1/2 inch square drive to be used with socket wrench
SETSCREW, PLUG, AND FLARE NUT WRENCHES.
(i) Flare Nut Wrenches.
A flare nut wrench (figure 20) is a
notched, thin-walled split box wrench especially designed to fit over nuts
in very close places. It is ideal for tightening brass tube flare nuts. It
grips the nut on five sides;