Square Holes | McMaster-Carr

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Shape

System of Measurement

Outside Width

Material

Outside Height

Wall Thickness

Length

Inside Width

Inside Height

Outside Corner Shape

REACH

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

RoHS

Compliant

Compliant with Exemptions

Square Drive Size

Export Control Classification Number (ECCN)

2B999

9A991

EAR99

DFARS Specialty Metals

Inside Corner Shape

Performance

Electrically Insulating

Flame Retardant

Foreign Object Damage Prevention

Yield Strength

30,000 psi to 32,999 psi

33,000 psi to 39,999 psi

40,000 psi to 59,999 psi

60,000 psi or greater

Specifications Met

Rail Type

I-Slotted/Single Flanged

Appearance

Fabrication

Maximum Temperature

Minimum Temperature

Hardness Rating

1,291 Products

Building and Machinery Hardware

Crank Handles

The offset handle gives extra leverage to maximize turning force

19 products

Ratchet Handles

Quickly adjust machine components and valves in tight spaces

13 products

Bolt-Together Framing and Fittings

Fasten through equally spaced holes to build and adjust guards, tables, and racks

100 products

Weld-Together Framing and Fittings

Permanently join rails and fittings to assemble heavy duty racks, shelving, and work tables

26 products

Press-Fit Framing and Fittings

Set up temporary partitions, guards, and displays using only a hammer

84 products

Bellows

Prevent dust and debris from damaging moving parts

67 products

Raw Materials

Steel

Strong, machinable, and weldable—all with material certificates for traceability

141 products

Aluminum

Lightweight, easy to machine, and corrosion resistant—all with material certificates for traceability

114 products

Plastic

A lightweight alternative to metal and glass

21 products

Brass

More machinable than copper and bronze—all with material certificates for traceability

11 products

Garolite

A strong, machinable alternative to metal and plastic widely used in circuit boards and gears

4 products

Stainless Steel

Resists corrosion and chemicals in most environments—all with material certificates for traceability

120 products

Carbon Fiber

The strongest composite we offer; comparable in strength to 6061 aluminum but lighter in weight

6 products

Fiberglass

A lightweight alternative to metal and wood widely used in electrical and structural applications

22 products

Fabricating and Machining

Hole Punches

Punch holes in metal, plastic, and fabric

19 products

File Handles

Push, twist, or clamp onto file tangs to securely grip files

3 products

Fluid Handling

Valve Knobs

Replace the knob on valves with a square stem, such as a spigot valve

14 products

Fastening and Joining

Ratchet Wrenches

Adjust fasteners in tight spaces without removing and repositioning the wrench

243 products

Socket Drivers

Tighten and loosen sockets from above when there isn't room to swing a standard wrench

10 products

Wrench Handles

Generate extra torque to loosen stubborn fasteners; also known as breaker bars

49 products

Speeder Handles

Crank the handle to fasten nuts and bolts quickly

8 products

Containers, Storage, and Furniture

Stacking Caps and Targets

Turn the ends of posts into stackable shelving and rack systems

6 products

Material Handling

Shipping Tubes

Protect rods, rolled-up blueprints, and other long, thin objects during shipping

191 products