Square Head Fasteners | McMaster-Carr

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30,000 psi to 99,999 psi

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396 Products

Square Head Screws

Medium-Strength SAE Grade 5 Steel Square Head Screws

Medium-Strength SAE Grade 5 Steel Square Head Screws

Suitable for fastening most machinery and equipment

Low-Strength ASTM Grade A Steel Square Head Screws

Low-Strength ASTM Grade A Steel Square Head Screws

About half the strength of medium-strength screws for light duty fastening, such as securing panels

High-Strength SAE Grade 8 Steel Square Head Screws

High-Strength SAE Grade 8 Steel Square Head Screws

Best for high-stress applications, such as valves, pumps, and motors

Other Products

Set Screws

Exert pressure at the tip to hold parts in place, unlike screws that hold material together with threads

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)