Squares | McMaster-Carr

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Rectangular Tube

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Specifications Met

CARB Compliant 17 CCR 93120

CPSC Compliant 16 CFR 1201 Category I and II

Federal Specification

OD

Yield Strength

Less than 10,000 psi

10,000 psi to 19,999 psi

20,000 psi to 99,999 psi

100,000 psi to 199,999 psi

200,000 psi or greater

Performance

Chemical Resistant

Corrosion Resistant

Easy Thermoform

Electrically Insulating

Erosion Resistant

Flame Resistant

Diameter

Fabrication

Rail Height

REACH

RoHS

Compliant with Exemptions

Export Control Classification Number (ECCN)

DFARS Specialty Metals

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13,074 Products

Most Likely Products

Steel

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

Aluminum

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

Stainless Steel

Stainless Steel

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

Squares

Check 90° angles during layout work with combination, angle, or pipefitters' squares

All Results

Raw Materials

Steel

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

Aluminum

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

Stainless Steel

Stainless Steel

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

Plastic

A lightweight alternative to metal and glass

Brass

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

Fiberglass

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

Garolite

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

Carbon Fiber

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

Rubber

Compresses and bounces back to shape; often used for sealing, cushioning, and shock absorbing

Foam

Pockets of air make it lighter in weight than rubber; good for packing, insulating, and sealing

Tungsten

Our densest metal resists wear and heat to make end mills, heat shields, electrodes, and more

Copper

Our most conductive metal for electrical applications—all with material certificates for traceability

Glass

Clear and highly heat and chemical resistant; often used in sights, lighting, and lab equipment

Bronze

Better wear resistance than copper and brass—all with material certificates for traceability

Titanium

The most corrosion-resistant metal we offer—all with material certificates for traceability

Ceramic

Hard and wear resistant, it also withstands corrosion and high temperatures

Aramid

Strong, lightweight, and an excellent thermal insulator; also known as Nomex

Tin

Soft and malleable for forming gaskets and filters; also mixes with other metals to make solder

Lead

A dense insulator often used to shield against radiation and absorb sound and vibration

Nickel

An upgrade from stainless steel to withstand harsh chemicals and acids—all with material certificates for traceability

Wood

Commonly used to build ramps, crates, and prototypes or to make repairs

Hard Fiber

Chemically treated to be hard and dense, this is the easiest composite to machine in our offering

Zinc

Draws corrosion away from nearby metal; an alternative to lead for sound barriers and vibration dampers

Carbon

An electrical conductor that’s often used in electronics and sensors

Graphite

Compressible or conductive for making high-temperature seals, furnace parts, and crucibles

Niobium

Conductive and corrosion resistant even at extreme temperatures—all with material certificates for traceability

Measuring and Inspecting

Squares

Check 90° angles during layout work with combination, angle, or pipefitters' squares

Square Holding Clamps

Square Holding Clamps

Position squares for repeat checking and marking

Combination Square Heads

Combination Square Heads

Attach combination square blades to form a combination square

Combination Square Blades

Combination Square Blades

Connect to a combination square head to create a combination square

Protractors

Set bevels and measure angles with everything from pocket-size to long-arm protractors

Calibration Squares

Calibration Squares

Lay horizontally or vertically on CNC machines to check the position of tools with high precision

Squareness Gauges

Squareness Gauges

Check frames and machined parts to see if they are leaning or uneven

Straightedges

Draw straight lines and check the straightness of surfaces

Angle Transfers

Angle Transfers

Duplicate any angle in construction and other applications

Straightedge/Protractors

Straightedge/Protractors

Draw straight lines and measure angle, slope, and rise with one tool

Levels

Ensure surfaces are completely horizontal or vertical

Color Calibrators

Color Calibrators

Calibrate your color meter to identify colors with precision

Building and Machinery Hardware

Weld-Together Framing and Fittings

Weld-Together Framing and Fittings

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

Bolt-Together Framing Rails

Bolt-Together Framing Rails

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

Bolt-Together Framing Fasteners

Bolt-Together Framing Fasteners

Secure bolt-together framing rails and brackets or anchor mounting feet in concrete

Fabricating and Machining

Fixturing Squares

Fixturing Squares

Build different fixtures on multiple sides of the same block

Clamps

Hold workpieces securely in place

Dovetail Blanks

Dovetail Blanks

Machine a blank workpiece with precut dovetails and locating slots for easy setup

Lathe Tool Blanks

Lathe Tool Blanks

Machine custom lathe tool bits

Multitools

A variety of tools and blades all in one

Prototyping Foam

Prototyping Foam

Carve, mill, or sand into lightweight parts for testing

Fastening and Joining

Shim Stock

Cut into custom shapes to align, space, and level components on dies, presses, and machinery

Shims

Align and space components on shafts, or level machinery, cabinets, and doors

Machine Key Stock

Machine Key Stock

Cut a custom length to transfer torque from shafts to components such as gears and sprockets

Tape

Bind, seal, and mark surfaces

Sealing

Gasket Material

Gasket Material

Cut custom shapes and sizes to fill gaps between flat surfaces

Electrical

Thermal Interface Material

Thermal Interface Material

Dissipate heat away from electronic components

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