Steel Machine Screws | McMaster-Carr

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Stainless Steel

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Brittle Materials

Cracked Concrete

Thin-Walled Holes

Uncracked Concrete

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37,077 Products

Fastening and Joining

Rounded Head Screws

Rounded Head Screws

Sit just above the surface for a low-profile finish and hold tighter than flat head screws

Flat Head Screws

Flat Head Screws

Fit in countersunk holes for a flush finish that won't snag on surrounding parts

Socket Head Screws

Socket Head Screws

With a deeper drive than flat and rounded head screws, these withstand more torque for a tighter hold

Hex Head Screws

Hex Head Screws

Used with nuts to create a stronger joint than flat and rounded screws

10,721 products

Tapping Screws

Fasten a range of materials together without needing to tap the hole first

Oval Head Screws

Oval Head Screws

The domed top sits slightly above the surface of countersunk holes for a decorative look

Fastener Assortments

Fastener Assortments

Keep a variety of common screws, nuts, and washers on hand

Tighten and loosen by hand without the need for tools

12-Point Screws

12-Point Screws

12 contact points handle more torque than a hex head while a flange eliminates the need for a washer

Square Head Screws

Square Head Screws

Turn the large flat sides with a wrench into square holes that stop further rotation

Masonry and Concrete Screws

Masonry and Concrete Screws

Anchor parts to masonry and concrete without tapping the hole first

Pentagon Head Screws

Pentagon Head Screws

Create a tamper-resistant joint with a head than can only be removed with a 5-point socket

Electrical Power, Networking, and Controlling

Electrical Enclosure Fasteners

Electrical Enclosure Fasteners

Mount components to your enclosure without worrying about leaks

Fabricating and Machining

T-Tracks

A versatile foundation for custom fixturing setups

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