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Machine Screws Buying Guide

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A Machine screw has a cylindrical shaft, threaded its entire length, and fits into a nut or a tapped hole. Several different head styles are offered:

Round Combo are the same as round head except for the option of using either a slotted or Phillips screwdriver.

Shop for Round Combo Machine Screws
Many sizes available

A pan head screw protrudes above the surface of the material to be fastened.

Shop for Pan Head Machine Screws
Many sizes available

Flat head screws are countersunk into the material for a smooth surface area.

Shop for Flat Head Machine Screws
Many sizes available

Flat undercut (slotted) heads are supplied to provide larger usable thread. Head height of undercut screws is approximately two-thirds that of standard screws. Drive depths are reduced proportionately.

Shop for Flat Undercut Machine Screws
Many sizes available