Square Nuts | McMaster-Carr

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386 Products

Square Nuts

Low-Strength Steel Square Nuts

Low-Strength Steel Square Nuts

About half the strength of medium-strength steel for light duty fastening

Medium-Strength Steel Square Nuts

Medium-Strength Steel Square Nuts

Suitable for fastening most machinery and equipment

Medium-Strength Steel Thin-Profile Square Nuts

Two-thirds the height of standard nuts for low-clearance areas

18-8 Stainless Steel Square Nuts

18-8 Stainless Steel Square Nuts

Resist corrosion where moisture and chemicals are present

18-8 Stainless Steel Thin-Profile Square Nuts

Use in low-clearance areas where moisture and chemicals are present

Super-Corrosion-Resistant 316 Stainless Steel Square Nuts

Super-Corrosion-Resistant 316 Stainless Steel Square Nuts

Withstand harsh chemicals better than 18-8 stainless steel

Ultra-High-Temperature Carbon Fiber Square Nuts

Ultra-High-Temperature Carbon Fiber Square Nuts

Won't warp in extreme-heat applications such as furnace fixtures

Brass Square Nuts

Brass Square Nuts

Conductive and nonmagnetic for securing electrical equipment

Fiberglass Square Nuts

Fiberglass Square Nuts

Chemical resistant, nonconductive, and lightweight

Other Products

Weld Nuts

Weld to metal surfaces to add permanent threads

Lead Screw Nuts

Lead Screw Nuts

Mate with lead screws to move components in a straight line

Strut Channel Nuts

Strut Channel Nuts

Fasten on threaded rod to connect components to strut channel

Snap-In Nuts

Push into square holes in thin materials to add bolts for aligning off-center parts

Tamper-Resistant Nuts

Tamper-Resistant Nuts

Hard to detach without special tools to prevent unwanted removal

Clip-On Nuts

Slide onto the edge of thin panels to create a fastening point

Cap Nuts

Cover and protect threads while adding a finished look; also known as acorn nuts

Lead Screws

Pair with lead screw nuts to move components in a straight line

Strut Channel Washers

Strut Channel Washers

Pair with hex nuts to connect threaded rod to strut channel

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