Round Stock | McMaster-Carr

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OSHA Compliant 29 CFR 1926.701

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Certificate Type

Material Certificate with Traceable Lot Number

Material Certificate with Traceable Lot Number and Test Report

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25,056 Products

Raw Materials

Steel

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

3,258 products

Plastic

A lightweight alternative to metal and glass

2,183 products

Stainless Steel

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

1,689 products

Aluminum

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

883 products

Brass

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

315 products

Rubber

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

642 products

Bronze

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

466 products

Copper

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

269 products

Tungsten

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

258 products

Garolite

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

601 products

Foam

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

153 products

Titanium

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

93 products

Glass

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

205 products

Carbon Fiber

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

134 products

Ceramic

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

410 products

Nickel

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

245 products

Lead

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

40 products

Fiberglass

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

76 products

Wood

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

92 products

Graphite

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

34 products

Cobalt

Resists impact and rapid temperature changes—all with material certificates for traceability

3 products

Hard Fiber

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

18 products

Wax

Create seals and prototypes, lubricate tools, and polish equipment

11 products

Molybdenum

Retains its shape and strength in extreme temperatures—all with material certificates for traceability

41 products

Mica

An electrical insulator that resists high temperatures; use in circuit breakers and heating elements

6 products

Kevlar

Super tough for protection against prolonged wear and abrasion

5 products

Niobium

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

8 products

Power Transmission

Shafts

Transmit power, motion, and speed between machine components

3,149 products

Fluid Handling

Tube and Tube Fittings

Typically more flexible than pipe for carrying liquids and gases in short runs around equipment

5,079 products

Sealing

Backer Rods

Insert into gaps before caulking to reduce how much sealant you need and improve adhesion

35 products

Building and Machinery Hardware

Bumpers

Absorb impact to protect equipment and surfaces from dents and scuffs

1,243 products

Slip-On Framing and Fittings

Insert rails into fittings and tighten screws to make guards, railings, and racks

26 products

Fastening and Joining

Shims

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

3,270 products

Washers

Nearly every size and shape imaginable, from flat washers to clipped to curved

66 products

Measuring and Inspecting

Metal Detector Calibration Kits

Test the sensitivity of food-processing metal detectors

1 product

Fabricating and Machining

Lathe Tool Blanks

Machine custom lathe tool bits

4 products

Facility and Grounds Maintenance

Rebar

Reinforces concrete to reduce the chance it will crack from expansion and contraction

9 products

Rebar Caps

Brightly colored to alert workers to exposed rebar and pipe

4 products