Figure 1-18. Bolt with expansion shield.
Figure 1-19. Types of bolts.
from the head to the shank. The ribbed type is
counterbored to permit the head of the bolt to fit flush
designed with longitudinal ribs, splines, or serrations
with, or below the surface of, the material being
on all or part of a shoulder located immediately
fastened. The bolt is then driven through the hole
beneath the head. The square-neck bolt is designed
with a hammer. Carriage bolts are chiefly for wood-
with a square or rectangular shoulder immediately
to-wood application but may also be used for wood-
beneath the head. Holes to receive carriage bolts are
bored to a tight fit of the body of the bolt and