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Machine Bolts, Hex and Square Head

What is a machine bolt?

Hex head and square head machine bolts are partially threaded bolts (shorter sizes fully threaded). The main difference between a bolt and a cap screw is that a bolt will not have the washer face under the head and will not have a chamfered point like a cap screw.

Available in coarse and fine thread, and in diameters 1/4" to 1-1/2" and up to length of 12". We carry a complete line of steel hex head machine bolts in (zinc) and galvanized finishes. Plain square head steel machine bolts are also available.