Square Bolts | McMaster-Carr

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2,337 Products

U-Bolts

Square U-Bolts

Suspend and route flat-bottomed objects such as strut channel and small duct

170 products

Rubber-Cushioned Square U-Bolts

Prevent corrosion and wear caused by metal-to-metal contact
For use with flat-bottomed objects such as strut channel and small duct

24 products

Other Products

Square Head Screws

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

145 products

Carriage Bolts

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

838 products

Set Screws

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

251 products

T-Slot Bolts

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

262 products

Elevator Bolts

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

119 products

Plow Bolts

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

35 products

Socket Head Screws

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

24 products

Fixture Kits

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

50 products

Wood Screws

Fasten material to wood or pieces of wood to each other

197 products

Drywall Screws

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

5 products

Tapping Screws

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

215 products

T-Slot Cleaners

Scrape debris out of machine table T-slots

2 products