Square Bolts | McMaster-Carr

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2,338 Products

Fastening and Joining

Square Head Screws

Square Head Screws

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

Carriage Bolts

A smooth head provides a finished look while a square neck keeps the bolt in place when using a nut

Set Screws

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

Plow Bolts

The head sits flush with countersunk holes while the bolt stays in place when tightening a nut

Elevator Bolts

Create a flush joint to allow movement in tight spaces such as grain elevators and belting systems

Socket Head Screws

Socket Head Screws

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

Wood Screws

Fasten material to wood or pieces of wood to each other

Drywall Screws

Fasten panels of drywall to materials such as wood, metal, and drywall

Tapping Screws

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

Material Handling

U-Bolts

Anchor heavy pipe, tube, and conduit; stronger than routing clamps and hangers

Fabricating and Machining

T-Slot Bolts

Secure clamps and workpieces to machine tables with quicker setup than a T-slot nut and stud

T-Slot Cleaners

T-Slot Cleaners

Scrape debris out of machine table T-slots

Fixture Kits

Everything needed to mount workpieces of different sizes to your machine table

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