Stock | McMaster-Carr

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CPSC Compliant 16 CFR 1201 Category I and II

NACE MR0175/ISO 15156

OSHA Standard

SAE Standard

State of California Standard

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Compliant with Exemptions

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DFARS Specialty Metals

Compliant

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Appearance

72,170 Products

Raw Materials

Aluminum

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

5,605 products

Steel

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

7,896 products

Stainless Steel

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

5,783 products

Brass

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

909 products

Copper

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

986 products

Bronze

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

874 products

Tungsten

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

322 products

Titanium

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

215 products

Nickel

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

340 products

Molybdenum

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

57 products

Zinc

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

41 products

Gold

Form into electronic components that won't corrode—all with material certificates for traceability

4 products

Niobium

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

14 products

Lead

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

115 products

Platinum

Formable and conductive while resisting extreme heat—all with material certificates for traceability

22 products

Cobalt

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

8 products

Tin

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

10 products

Tantalum

Conductive with a higher melting point than most metals—all with material certificates for traceability

23 products

Plastic

A lightweight alternative to metal and glass

9,052 products

Garolite

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

1,991 products

Fiberglass

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

442 products

Carbon Fiber

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

318 products

Kevlar

Super tough for protection against prolonged wear and abrasion

11 products

Hard Fiber

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

79 products

Aramid

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

10 products

Rubber

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

6,205 products

Foam

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

2,662 products

Mica

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

199 products

Glass

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

337 products

Ceramic

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

708 products

Wood

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

246 products

Fabric

Use to cover, clean, and insulate objects

204 products

Graphite

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

80 products

Leather

Durable and long lasting; often used for belting, lacing, and sealing applications

54 products

Felt

Thicker and more absorbent than fabric for insulating, polishing, cushioning, and gasketing

905 products

Wax

Create seals and prototypes, lubricate tools, and polish equipment

47 products

Carbon

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

19 products

Fastening and Joining

Shim Stock

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

1,260 products

Shims

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

54 products

Machine Keys

Transmit torque from rotating shafts to gears, sprockets, and other machine parts

799 products

Machine Key Stock

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

824 products

Standoffs

Separate, position, or connect components in assemblies

1,257 products

Threaded Rods

Anchor, connect, or hang components in a wide variety of applications

5,369 products

Studs

Press, weld, or screw in place to add a threaded fastening point

637 products

Shoulder Screws

Rotate parts around the cylinder under the head to guide and align them during installation

36 products

Single-End Studs

Use the unthreaded end as a pivot point, hinge, shaft, or locator pin

184 products

Dowel Pin Stock

Cut to the length you need for positioning and holding parts in place

53 products

Thread Adapters

Join threads of a different type, size, and gender

27 products

Solder

Join pieces of metal without melting the base material

357 products

Fabricating and Machining

Casting Metals

Melt and pour into molds to make metal parts and prototypes

19 products

Prototyping Foam

Carve, mill, or sand into lightweight parts for testing

27 products

3D Printer Filaments

Run through filament 3D printers to form plastic parts

122 products

3D Printer Build Surfaces

Stick on top of printer beds for more accurate parts than those made on bare beds

30 products

3D Printer Resins

Create parts from resin 3D printers with greater detail than filament 3D printers

44 products

Lathe Tool Blanks

Machine custom lathe tool bits

48 products

Dovetail Blanks

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

5 products

Setup Studs

Secure setup clamps and fixtures to your machine table or assemble heavy machines

627 products

Band Saw Blade Coil Stock

Cut to length and weld the ends together to create band saw blades

70 products

Power Transmission

Rotary Shafts

Pair with gears, sprockets, and bearings to transmit rotary motion

1,762 products

Linear Shafts

Pair with linear bearings and shaft supports to create smooth, precise motion

1,318 products

Idler Shafts

Support idler sprockets and pulleys in tensioning applications

28 products

Linear Shaft Supports

Support linear shafts to prevent bending and rolling under loads

24 products

Precision Lead Screws

Pair with precision lead screw nuts for accurate starts and stops in your assembly

546 products

Brake and Clutch Friction Lining

Replace the lining in brakes and clutches; also known as friction material

145 products

Compression Springs

When squeezed, springs push back to their original length

166 products

Extension Springs

When stretched, springs pull their ends back together

106 products

Die Springs

Support heavy loads with minimal compression in high-impact jobs such as punching and stamping

24 products

Ball Screws and Nuts

Provide smooth travel where high speeds, accurate positioning, and repeatable movement are required

205 products

Lead Screws

Pair with lead screw nuts to move components in a straight line

503 products

Timing Belt Pulley Stock

Machine your own timing belt pulleys to fit an exact width and shaft diameter

17 products

Spur Gear Stock

Machine your own gears to an exact face width and shaft diameter

18 products

Sleeve Splines and Bearings

Combine sleeve splines and bearings to create linear and rotary motion systems

21 products

Gear Box Shafts

Convert output drives from female to male

10 products

End Supports for Ball Screws and Precision Lead Screws

Brace and secure the ends of ball screws and precision lead screws

16 products

Connecting Rods

Use with rod ends and swivel joints to link components in push/pull assemblies

808 products

Roller Screws and Nuts

Create more points of contact to handle much higher loads than ball screws and nuts of the same size

8 products

Sealing

Cord Stock

Cut to length to create customized seals

671 products

Backer Rods

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

35 products

O-Ring Bonding Kits

Everything needed to make O-rings

51 products

Communication

Tags

Hang throughout facilities to convey information

461 products

Message Plates

Fasten to doors, walls, and plate holders to identify locations and objects

276 products

Legend Plates

Mark switches and lights on control panels for easy identification

25 products

Signs

Everything from accident prevention to traffic control to exit signs

22 products

Building and Machinery Hardware

Bolt-Together Framing and Fittings

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

124 products

Weld-Together Framing and Fittings

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

41 products

Slip-On Framing and Fittings

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

434 products

Clamp-On Framing Rails

Build assembly stations, conveyors, and racks that can be modified without dismantling them

25 products

Acoustic Insulation

Absorb sound to quiet noisy areas and machines

53 products

Vibration-Damping Sheets and Tape

Stick to vibrating surfaces such as duct, between parts, or on floor joists to reduce noise

38 products

Sound Barrier Sheets

Block and reflect noise to keep it from reaching other parts of your facility

16 products

Temporary Floor Protectors

Protect floors from stains, dirt, and wear during painting and remodeling work

13 products

Protective Film and Tape

Adhere to surfaces to keep them free of scratches, chemicals, moisture, and germs

3 products

Window Film

Apply to windows for privacy, insulation, less glare, and a lower chance of shattering

41 products

Fluid Handling

Perforated Sheets

Filter, sort, separate, and strain liquid or dry material

237 products

Filter Mesh

Strain particles out of various substances

4,061 products

Tubing Samples

Test tubing material or hardness to confirm it works for your application

4 products

Float Rods

Connect valve bodies and floats to build or repair a float valve

18 products

Material Handling

Foam Wrap

Cushion items with less bulk than bubble wrap to protect them while shipping and storing

15 products

Corrugated Sheets

Slide between pallets and stacked items to protect them from damage or reinforce the bottom of boxes

20 products

Heating, Ventilation, and Air Conditioning

Insulation Sheets

Line the walls of furnaces, freezers, ductwork, and buildings to keep heat in or out

256 products

Pipe Insulation

Fit around pipe, tubing, and tanks to reduce heat loss or condensation

100 products

Pipe Insulation Jacketing

Guard pipe insulation from impact, moisture, and corrosion

15 products

Heat Barriers

Protect equipment and surfaces from damage caused by nearby heat sources

16 products

Pipe Insulation Repair Strips

Patch and protect damaged pipe insulation

3 products

Measuring and Inspecting

Feeler Gauges

Check gaps and alignment between machine parts and other surfaces

381 products

Metal Detector Calibration Kits

Test the sensitivity of food-processing metal detectors

1 product

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

Steel Hat Channel

Creates space for insulation inside walls and ceilings

2 products

Drop Cloths

Cover floors to protect them from spills, splatters, and dirty shoes

19 products

Containers, Storage, and Furniture

Metal Panels

Close off openings in structures while allowing air to pass through

253 products

Wall-Covering Panels

Attach to wallboard, masonry, and studs for a textured surface that resists impact and mold

8 products

Electrical Power, Networking, and Controlling

Circuit Boards

Create your own circuit board designs by adding components

50 products

Thermal Interface Pads

Soft and flexible, so they conform to rough surfaces and fill gaps between two surfaces

24 products