Plastic Circles | McMaster-Carr

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Printed Circuit Boards

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Bench-Top Cutoff Saws

Diluted Salt Solutions

Drills

Floor-Mount Cutoff Saws

Grinders for Bits and Burs

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RoHS

Compliant with Exemptions

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Compliant

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U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

DFARS Specialty Metals

Compliant

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12,163 Products

Most Likely Products

Plastic

A lightweight alternative to metal and glass

2,180 products

Bumpers

Absorb impact to protect equipment and surfaces from dents and scuffs

362 products

Foam

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

110 products

Masking Tape

Temporarily join or protect surfaces

90 products

Cushioning Washers

Cushion joints to dampen vibration and protect them from wear

116 products

All Results

Raw Materials

Plastic

A lightweight alternative to metal and glass

2,180 products

Foam

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

110 products

Rubber

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

329 products

Garolite

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

601 products

Fiberglass

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

76 products

Carbon Fiber

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

130 products

Hard Fiber

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

17 products

Fastening and Joining

Cushioning Washers

Cushion joints to dampen vibration and protect them from wear

116 products

Washers

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

1,207 products

Sealing Washers

Prevent fluids from leaking around fasteners

75 products

Insulating Washers

Isolate screws from electrical current and prevent corrosion from mating different metals

252 products

Lock Washers

Resist vibration to prevent fasteners from loosening

9 products

Finishing Washers

Screw heads sit flush to prevent snagging and to create a neat, finished appearance

14 products

Dowel Pins

Align parts before assembly or use as a pivot, shaft, or hinge to join moving components

105 products

Quick-Release Pins

Fasten or remove components on equipment with a spring-loaded retaining ball

6 products

Shims

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

183 products

Anchors

Secure anything from signs to heavy machinery in concrete, brick, and drywall

35 products

Standoffs

Separate, position, or connect components in assemblies

250 products

Screw Nails

Drive like nails but hold like screws in drilled holes in wood, plastic, drywall, and masonry

72 products

Masking Tape

Temporarily join or protect surfaces

90 products

Mounting Tape

Mount everything from signs and panels to carpet and padding

17 products

Mounting Adhesives

Mount objects with a range of adhesives, including glue-on-a-roll and glue shapes

1 product

Magnets

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

26 products

Hook and Loop

Press interlocking pieces together to join materials

40 products

Snap-Together Fasteners

Mate the mushroom-shaped heads to join materials together with more holding power than hook and loop

4 products

Building and Machinery Hardware

Bumpers

Absorb impact to protect equipment and surfaces from dents and scuffs

362 products

Protective Caps

Protect just about anything, including pipe, flanges, screws, and posts

12 products

Antislip Tape

Add traction to smooth surfaces, such as floors, rollers, and ladder handrails

2 products

Lockouts

Ensure that machines stay turned off to prevent accidents during maintenance work

4 products

Protective Feet

Add to furniture and light equipment to protect floors from scratches and wear

76 products

Vibration-Damping Mounts

Attach to machinery to reduce vibration and noise and extend service life

2 products

Fabricating and Machining

Precision Knife Blades

Replace the blade in a precision knife

1 product

Buffing and Polishing Pads

Remove imperfections and apply protective coatings on delicate surfaces

24 products

Buffing Kits

Everything you need to remove scratches and surface imperfections with a buffer or polisher

2 products

Buffing and Polishing Wheels

Remove surface imperfections to achieve a precise, flat finish

10 products

Polishing Bonnets

Remove swirl marks and imperfections from a surface after buffing

1 product

Rotary Tool Circle Cutters

Attach to rotary tools to cut circular holes in a variety of materials

1 product

Rotary Tool Cutoff Wheels

Replace the cutoff wheel on your Dremel rotary tool

18 products

Rotary Tool Blades

Replace the blade on your Dremel rotary tool

17 products

Cutoff Saw Wheels

Replace the wheel on your cutoff saw

69 products

Spiral Saw Cutoff Wheels

Attach to your RotoZip spiral saw to make straight cuts

2 products

Tube Brushes

Remove contaminants from tubes, pipes, and holes

1,115 products

Wheel Brushes

Bristles on the edge of the wheel clean, sand, and debur targeted areas

328 products

Cup Brushes

Wider diameters than end brushes clean flat surfaces with more surface area

143 products

Sanding Blocks

For better control than powered sanders, sand surfaces manually

6 products

Sanding Discs

Add to sanders, floor buffers, and other tools to smooth out workpieces and remove paint and rust

934 products

Sanding Disc Cushioning Pads

Add between your sanding disc and backup pad for a finer finish

4 products

Grinding Bits

Pair with grinders for light material removal and precision grinding

36 products

Lapping Film

Polish workpieces without the mess of pastes and slurries

20 products

Cutoff Wheels

Install in grinders to cut through metal, concrete, and ceramics

317 products

Router Guides

Make precise circular or intricate cuts with routers

1 product

Grinding Wheels

Add to grinders to remove material from work surfaces using abrasion

2 products

Communication

Tags

Hang throughout facilities to convey information

34 products

Labels

Stick onto items to identify or convey information about them

70 products

Legend Plates

Mark switches and lights on control panels for easy identification

11 products

RFID Tags

Track the location of inventory in your facility; pair with RFID reader/writers

20 products

Fire Hydrant Markers

Label fire hydrants to indicate their flow rate or status

4 products

Floor Decals

Stick to the floor to give instructions or direct traffic in and around your facility

38 products

Signs

Everything from accident prevention to traffic control to exit signs

2 products

Stencils

Paint over or trace to create everything from custom messages to drafting designs

8 products

Safety Equipment

Safety Mirrors

See what's happening around corners, at intersections, down aisles, and over counters

80 products

Welding Lenses

Replace the lens in your welding helmet or goggles

3 products

Facility and Grounds Maintenance

Floor Drain Covers

Put a lid on open drains to prevent accidents and injuries

4 products

Drain Cleanout Hole Covers

Conceal drain cleanout plugs in walls and floors while keeping them accessible

2 products

Drain Cleanouts

Create an access point to inspect and clean floor drain pipelines

3 products

Paint Can Lid Rings

Fit around the entire rim of paint cans to secure lids more tightly than clips

4 products

Sealing

O-Rings

Fit snugly into a groove between parts to create a leak-resistant seal

1,444 products

Backup Rings

Extend the life of O-rings and improve their performance under high pressure

169 products

Tube Fitting Gaskets

Prevent leaks when connecting sanitary tube fittings

109 products

Wear Rings

Guide rods and pistons to prevent uneven wear and extend the life of seals

54 products

Fluid Handling

Tube and Tube Fittings

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

13 products

Filter Mesh

Strain particles out of various substances

4 products

Heating Pads

Stick to drums, pails, and other containers to indirectly warm their contents

25 products

Sintered Filters

Tiny holes let particles such as air, gas, and vapor pass through while trapping contaminants

6 products

Material Handling

Wheels

Move objects with ease

381 products

Routing Rings

Suspend wire and cable by feeding it through the eyehole

5 products

Low-Friction Tape

Create a slippery lining to keep parts moving or use as a release surface on heat sealers and molds

14 products

Lighting

Light Pipes

Concentrate and direct light from the bulb on a circuit board to a display

16 products

Measuring and Inspecting

Metal Detector Calibration Kits

Test the sensitivity of food-processing metal detectors

1 product

Parallel Rules

Draw parallel lines, as well as circles, arcs, and angles

1 product

Magnifiers

Workstation, hand-held, headband, and eyeglass magnifiers

3 products

Levels

Ensure surfaces are completely horizontal or vertical

6 products

Level Vials

Replace vials in levels or equipment

2 products

Machine Vision Lights

Illuminate an object so your machine vision camera can capture detailed images for inspection

9 products

Power Transmission

Idler Rollers

Guide boxes and parts as they pass through conveyor systems

87 products

Disc Springs

Maintain tension and separate components on shafts, under bolt heads, and at the ends of valves

19 products

Sleeve Spline Bearings

Pair with sleeve splines to transmit rotary power or move loads along the shaft

12 products

Containers, Storage, and Furniture

Petri Dishes

Grow bacteria and other microorganisms

5 products

Sanding Abrasive Dispensers

Organize your sanding rolls so they're ready to grab and go

2 products

Graduated Cylinder Bumpers

Slip over your cylinder to prevent it from breaking if tipped

9 products