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Screw-bolt.

One having a screw-thread on its shank. See bolt, Fig. 768.

Fig. 4710 illustrates various carriage screw-bolts.

a, axle-clip.e, elliptic head.
b, carriage.f, T-headed, or shaft.
c, step.g, cone-headed bolt.
d, pointed tire.

See Fig. 768, page 322.

Screw-bolts.

Screw-Threads, Bolt-Heads, and Nuts, as determined and recommended by Committee of Franklin Institute of Philadelphia, 1864.

Number of Threads per inch. Angle 60°

Diameter of Bolt.Threads.Diameter of Bolt.Threads.Diameter of Bolt.Threads.Diameter of Bolt.Threads.Diameter of Bolt.Threads.
Ins.No.Ins.No.Ins.No.Ins.No.Ins.No.
1/4203/4101 5/85 1/233 1/24 3/42 5/8
5/16187/891 3/453 1/43 1/252 1/2
3/816181 7/853 1/23 1/45 1/42 1/2
7/16141 1/8724 1/23 3/435 1/22 3/8
1/2131 1/472 1/44 1/2435 3/42 3/8
9/16121 3/862 1/244 1/42 7/862 1/4
5/8111 1/262 3/444 1/22 3/4

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