USE/CARE OF HANDTOOLS & MEASURING TOOLS - OD1621 - LESSON 2/TASK 1
(f) Crowfoot Wrenches. A crowfoot wrench (figure 17) has an open-
end in the box containing notches and a square hole which fits the handle.
This configuration makes the crowfoot wrench the best wrench to use on a nut
located in a very tight place.
They are used in conjunction with socket
wrench handles having a 3/8 or 1/2 inch square drive. They range in size
from 3/8 to 2 1/2 inches.
FIGURE 17.
SOCKET AND CROWFOOT WRENCHES.
(g) Setscrew and Hollow-Head Capscrew Wrenches.
Most setscrews
and hollow-head capscrews have a hexagon (six-sided) socket. The commonly
known key (Allen) wrench (figure 20 on page 36) is L-shaped, made of tool
steel having a hexagonal or square section to fit these screws.
Splined
setscrew wrenches are made of round stock with ends to fit little flutes or
splines in headless setscrews. A hollow-head capscrew set is also supplied.
This set has detachable sockets which are used with the accompanying
handles.
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