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Machine screws, Combo round head, Zinc plated steel, 20, 2-1/2"

Combination round head

Machine screw diameter is measured on the outside of the threads.

Combo round head machine screw diameter

Diameter and Thread count

1/4"-20

See also
Metric machine screw

Metric machine screws

Screws with machine threads for use with a nut or in a tapped hole.

Socket product

Socket screws

Screws with an Allen wrench drive.