Blocks | McMaster-Carr

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CARB Compliant 17 CCR 93120

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OSHA Compliant 29 CFR 1910.178

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34,228 Products

Raw Materials

Aluminum

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

2,929 products

Plastic

A lightweight alternative to metal and glass

6,782 products

Steel

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

3,520 products

Stainless Steel

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

2,727 products

Foam

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

2,527 products

Rubber

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

4,307 products

Copper

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

715 products

Wood

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

154 products

Ceramic

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

269 products

Brass

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

510 products

Graphite

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

46 products

Garolite

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

1,365 products

Tungsten

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

67 products

Lead

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

66 products

Carbon Fiber

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

140 products

Wax

Create seals and prototypes, lubricate tools, and polish equipment

37 products

Glass

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

132 products

Bronze

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

210 products

Fiberglass

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

233 products

Nickel

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

95 products

Carbon

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

21 products

Felt

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

885 products

Niobium

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

6 products

Tin

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

10 products

Fabricating and Machining

Setup Blocks

Use as mounting bases and supports to ensure accurate angles and spacing

6 products

Fixture Keys

Locate fixtures and vises on your machine table

39 products

V-Blocks

Hold round workpieces

40 products

Angle Plates

Ensure accurate right angles and hold workpieces and fixtures perpendicular to your machine table

61 products

Pin Removal Blocks

Remove a range of pin sizes from workpieces by tapping them into holes with a punch and hammer

1 product

Step Blocks

Support setup clamps for quick height adjustments

10 products

Milling Machine Collet Blocks

Hold workpieces to machine parallel or square edges and drill crossholes

2 products

Alignment Locks

Precisely align your mold halves

25 products

Forming Blocks

Place on the back side of workpieces for support as you hammer them; also known as dolly blocks

5 products

Door Track Straighteners

Hammer dented or crushed overhead door track back into shape instead of replacing it

1 product

Magnetic Workholding Plates

Keep metal workpieces firmly in place for grinding, drilling, and electrical discharge machining

39 products

Sanding Blocks

For better control than powered sanders, sand surfaces manually

15 products

Fluid Handling

Manifolds

Distribute air or fluid to multiple places from a single source; also called headers

631 products

Junction Blocks

Organize and separate multiple lines in a pipe system; air and fluid flow through the threaded holes

77 products

Pipe and Pipe Fittings

Generally thicker and more rigid than tubing for distributing liquids and gases through your facility

1 product

Hose and Hose Fittings

Flexible and stronger than tubing; often used to convey liquids and gases under pressure

8 products

Valve Mounts

Match standard NFPA mounting patterns to connect valves with multiple ports

8 products

Electrical

Terminal Blocks

Mate with terminals to complete circuits in control panels, motors, and small machines

394 products

Distribution Blocks

Distribute electricity from a single power source to several devices in a circuit

47 products

Distribution Bars

Route electricity within switchboards and battery banks; also known as bus bars

31 products

DIN Rail Spacers

Slide along rails to separate and organize terminal blocks, relays, and other components

1 product

DIN Rail Stops

Keep components such as terminal locks and relays from shifting on rails

11 products

Grounding Bars

Create a convenient central grounding point by connecting multiple ground wires

14 products

Grounding Blocks

In cabinets and other tight spaces, ground multiple wires at one convenient spot

8 products

Fuse Blocks

Send power to one or more circuits and house a fuse for each of them

142 products

Thermal Interface Material

Dissipate heat away from electronic components

24 products

Power Transmission

Mounted Bearings

Ball, roller, and sleeve bearings ready to bolt in place

941 products

Bearing Housings

Mount your own bearings in place

64 products

Linear Bearings

Minimize friction as parts move along a shaft

395 products

Bearing Adapter Sleeves

Close gaps between your bearing and shaft for a tight fit

29 products

Linear Bearing Brakes

Lock bearings in place on a shaft for precise positioning

10 products

Ball Bearings

Create less friction than other bearings for use at high speeds

60 products

Sleeve Bearings

With no moving parts, the plainest type of bearing

14 products

Shaft Supports

Support linear motion shafts to prevent bending and rolling under loads

164 products

Guide Rail Carriages

Carry loads along guide rails on accurate and repeatable paths in automated systems

389 products

Material Handling

Pulleys

Mount or suspend to guide wire rope for lifting and pulling loads

140 products

Hoists

Lift and position heavy loads using manual, electric, or air power

6 products

Pipe Hangers

Suspend pipe, conduit, and tube from threaded rods, hooks, and straps

84 products

Routing Clamps

Secure routed lines of pipe, tubing, and conduit

506 products

Routing Clamp Rails

Use with rail-mount routing clamps to route pressurized lines in hydraulic systems

14 products

Wheel Chocks

Secure wheels in place while loading, unloading, and servicing vehicles

50 products

Conveyor Guide Cross Blocks

Join conveyor guide mounting rods at different angles

46 products

Magnetic Conveyor Belt Plates

Keep ferrous objects in place as they move along your conveyor belt

33 products

Measuring and Inspecting

Gauge Blocks

Confirm dies, fixtures, and other workpieces meet precise tolerances and calibrate measuring tools

738 products

Calibration Squares

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

2 products

Bore Gauge Calibrators

Set and check the accuracy of two-point bore gauges

1 product

Height Gauge Calibrators

Ensure height gauges are accurate

3 products

Hardness Calibration Test Blocks

Confirm testers are accurate for a specific Rockwell or Brinell hardness

13 products

Hardness Testers

Determine the Rockwell, Brinell, or Durometer hardness of any material

2 products

Color Calibrators

Calibrate your color meter to identify colors with precision

1 product

Load Cell Junction Boxes

Join multiple load cells to combine their weight measurements

2 products

Facility and Grounds Maintenance

Deodorizers

Eliminate odors in everything from trash cans and bathrooms to machine coolant and wastewater

2 products

Knife Blocks

Store up to five knives and one sharpening steel

1 product

Fastening and Joining

Magnets

Attract or repel metal objects to hang, secure, or position them

234 products

Building and Machinery Hardware

T-Slotted Framing and Fittings

The most versatile system, attach fittings along the continuous slots to build virtually anything

12 products

Lubricating

Grease Fitting Manifolds

Lubricate multiple points with the same amount and type of grease using one grease fitting

3 products

Grease Fitting Junction Blocks

Send different types and amounts of grease from multiple grease fittings to lubricate several points

9 products

Safety Equipment

Parking Gate Arms

Replace arms on motor-powered gates

3 products

Containers, Storage, and Furniture

Wheel Chock Holders

Store wheel chocks near docks and loading zones so they’re always on hand

3 products