Hillman 1/4 In. 20 tpi 3 In. Round Head Combination Machine Screw (100-Count)

A machine screw is a fastening screw with a machine-cut thread throughout the length of its shank.

Machine screws are used with nuts or screwed directly into a threaded receptacle to fasten various components together in machines, tools, etc.

Fasten with a screwdriver to reduce risk of over-tightening and protect the screw and fastened material.

If nuts are needed, use with nuts of the same finish and threading for proper fit.

The length of a machine screw is measured from under the head to the point of the screw.