Stock | McMaster-Carr

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Specifications Met

CPSC Compliant 16 CFR 1201 Category I and II

DIN Standard

EN Standard

Federal Specification

IEC 60404-8-8

IPC Standard

ISO Standard

NACE MR0175/ISO 15156

OSHA Standard

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RoHS

Compliant with Exemptions

REACH

Appearance

Export Control Classification Number (ECCN)

DFARS Specialty Metals

Fabrication

Performance

Electrically Insulating

Maximum Temperature

Thread Size

66,713 Products

Raw Materials

Aluminum

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

5,659 products

Steel

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

7,914 products

Stainless Steel

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

4,569 products

Plastic

A lightweight alternative to metal and glass

9,097 products

Brass

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

881 products

Bronze

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

676 products

Copper

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

989 products

Tungsten

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

325 products

Titanium

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

216 products

Garolite

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

1,988 products

Rubber

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

4,708 products

Fiberglass

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

456 products

Carbon Fiber

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

315 products

Mica

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

57 products

Glass

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

337 products

Foam

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

2,685 products

Ceramic

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

710 products

Wood

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

245 products

Nickel

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

340 products

Fabric

Use to cover, clean, and insulate objects

213 products

Lead

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

107 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

Gold

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

4 products

Wax

Create seals and prototypes, lubricate tools, and polish equipment

48 products

Molybdenum

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

57 products

Kevlar

Super tough for protection against prolonged wear and abrasion

10 products

Felt

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

919 products

Tantalum

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

23 products

Niobium

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

14 products

Zinc

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

41 products

Carbon

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

21 products

Hard Fiber

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

80 products

Aramid

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

10 products

Cobalt

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

8 products

Platinum

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

22 products

Tin

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

10 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 Key Stock

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

827 products

Machine Keys

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

799 products

Threaded Rods

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

5,336 products

Studs

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

674 products

Set Screws

Exert pressure at the tip to hold parts in place, unlike screws that hold material together with threads

2 products

Dowel Pin Stock

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

53 products

Standoffs

Threaded to separate or connect parts as well as position components in assemblies

3 products

Single-End Studs

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

184 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

Power Transmission

Shafts

Transmit power, motion, and speed between machine components

3,159 products

Shaft Supports

Support linear motion shafts to prevent bending and rolling under loads

24 products

Ball Screws and Nuts

Internal ball bearings roll on screws for low friction when moving components at high speeds

200 products

Compression Springs

When squeezed, springs push back to their original length

166 products

Extension Springs

As stretched, springs become increasingly harder to pull

106 products

Die Springs

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

24 products

Brake and Clutch Friction Lining

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

145 products

Lead Screws and Nuts

Components travel along a screw with broad, square threads to clamp and lift heavy loads

1,053 products

Lead and Ball Screw End Supports

Brace and secure the ends of lead screws and ball screws

16 products

Gear Stock

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

18 products

Timing Belt Pulley Stock

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

17 products

Connecting Rods

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

808 products

Splines and Spline Bearings

Transmit rotary power or move loads along the length of splines

35 products

Roller Screws and Nuts

More contact points to move heavier loads than ball and lead screw assemblies

8 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

Lathe Tool Blanks

Machine custom lathe tool bits

50 products

3D Printer Filaments

Run through filament 3D printers to form plastic parts

133 products

3D Printer Resins

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

46 products

3D Printer Build Surfaces

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

28 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

619 products

Band Saw Blade Coil Stock

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

70 products

Sealing

O-Ring Cord Stock

Cut to length to create customized seals

295 products

O-Ring Bonding Kits

Everything needed to make O-rings

7 products

Backer Rods

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

35 products

Communication

Tags

Hang throughout facilities to convey information

347 products

Message Plates

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

279 products

Legend Plates

Mark switches and lights on control panels for easy identification

24 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

122 products

Weld-Together Framing and Fittings

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

40 products

Slip-On Framing and Fittings

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

433 products

Clamp-On Framing and Fittings

Two-piece fittings let you modify assembly stations, conveyors, and racks without dismantling them

33 products

Window Film

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

39 products

Temporary Floor Protectors

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

12 products

Fluid Handling

Perforated Sheets

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

237 products

Filter Mesh

Strain particles out of various substances

4,071 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

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

Heating, Ventilation, and Air Conditioning

Thermal Insulation Sheets

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

251 products

Pipe Insulation Jacketing

Guard pipe insulation from impact, moisture, and corrosion

13 products

Pipe Insulation

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

109 products

Pipe Insulation Repair Strips

Patch and protect damaged pipe insulation

3 products

Heat Barriers

Protect equipment and surfaces from damage caused by nearby heat sources

16 products

Material Handling

Corrugated Sheets

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

20 products

Foam Wrap

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

15 products

Safety Equipment

Vibration-Damping Sheets

Stick to duct, housings, and other vibrating equipment to reduce noise

11 products

Acoustic Insulation

Absorb sound to quiet noisy areas and machines

53 products

Sound Barrier Sheets

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

14 products

Facility and Grounds Maintenance

Steel Hat Channel

Creates space for insulation inside walls and ceilings

2 products

Toilet Tank Replacement Parts

Replace parts such as flappers, fill valves, and floats in your toilet tank

3 products

Rebar Caps

Brightly colored to alert workers to exposed rebar and pipe

4 products

Rebar

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

9 products

Drop Cloths

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

19 products

Electrical

Circuit Boards

Create your own circuit board designs by adding components

50 products

Thermal Interface Material

Dissipate heat away from electronic components

24 products

Containers, Storage, and Furniture

Wall-Covering Panels

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

2 products

Metal Panels

Close off openings in structures while allowing air to pass through

254 products