Square Steel Tubing | McMaster-Carr

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System of Measurement

Outside Width

Wall Thickness

Outside Height

Shape

Length

Inside Width

Material

Inside Height

Width

Thickness

Specifications Met

ANSI/MSS SP-58 Type 23

ASTM Standard

EN 10305-5

Fed. Spec. WW-H-171 Type 23

SAE AMS-T-6736

Yield Strength

Less than 34,000 psi

34,000 psi to 39,999 psi

40,000 psi to 59,999 psi

60,000 psi to 72,999 psi

73,000 psi or greater

Fabrication

Bolt-Together Framing Component

Rail Type

Steel Grade

1005-1026 Low-Carbon Steel

1010 Low-Carbon Steel

A500 Low-Carbon Steel

A513 Low-Carbon Steel

Strut Channel Type

RoHS

Compliant with Exemptions

Not Compliant

REACH

Compliant

Not Compliant

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

Yes

Export Control Classification Number (ECCN)

2B999

9A991

EAR99

DFARS Specialty Metals

Diameter

Finish

1,287 Products

Raw Materials

Steel

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

141 products

Building and Machinery Hardware

Bolt-Together Framing Rails

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

36 products

Bolt-Together Framing Feet

Stabilize bolt-together framing structures against floors, walls, and ceilings

5 products

Bolt-Together Framing Structural Brackets

Connect the surfaces and corners of bolt-together rails to build guards, tables, and racks

1 product

Weld-Together Framing and Fittings

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

18 products

Strut Channel Framing and Fittings

Secure fittings in the U-shaped channel to route conduit and pipe or build other structures

1,065 products

Press-Fit Framing and Fittings

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

7 products

Containers, Storage, and Furniture

Stacking Caps and Targets

Turn the ends of posts into stackable shelving and rack systems

6 products

Electrical Power, Networking, and Controlling

Electrical Enclosure Mounting Channels

Position components inside electrical enclosures without drilling holes, which can leak

9 products

Fabricating and Machining

Strut Channel Cutters

Shear strut channel down to size using a die instead of a blade for safer, cleaner cuts

4 products