Figure 1-44.
Expansion anchor bolt
c. Molly UniversalScrew Anchors. Molly fasteners (Figure 145)
provide a solid means of attaching fixtures to interior walls. A
hole is drilled the same size as that of the outside diameter of the
fastener. These fasteners are designed to expand behind the wall
covering.
Figure 1-45.
Molly universal screw anchors
1-12. Bolts. Bolts are made of steel with either round, square, or
octagon heads and threaded shanks. The threads may run the full
length of the bolt, or they may stop a certain distance from the
head, leaving a smooth upper shank. Bolts are used to fasten timber,
steel, or other materials. They range in diameter from 3/16 to 1 1/2
inches, and in lengths from 3/4 to 30 inches. They are available in
three main styles: stove bolts, machine bolts, and carriage bolts.
1-39
EN5155
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