Circles | McMaster-Carr

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Specifications Met

California AB1953

Federal Specification

Fabrication

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Precision Ground

Yield Strength

Less than 10,000 psi

10,000 psi to 19,999 psi

20,000 psi to 99,999 psi

100,000 psi to 199,999 psi

200,000 psi or greater

Thickness

0.001" to 0.003"

0.002" to 0.004"

0.004" to 0.006"

0.005" to 0.006"

0.005" to 0.024"

0.005" to 0.030"

End Type

One Open and One Closed

Retaining Ring Groove

Spring-Loaded Ball

Certificate Type

Material Certificate with Traceable Lot Number

Material Certificate with Traceable Lot Number and Test Report

Appearance

Hardness

Heat Treatment

Stress Relieved

Width

Steel Grade

12L13 Carbon Steel

12L14 Carbon Steel

1005-1026 Low-Carbon Steel

1006-1008 Low-Carbon Steel

1008 Low-Carbon Steel

1008-1010 Low-Carbon Steel

1010 Low-Carbon Steel

1018 Low-Carbon Steel

1020 Low-Carbon Steel

1020-1026 Low-Carbon Steel

1026 Low-Carbon Steel

1117 Carbon Steel

1144 Carbon Steel

1215 Carbon Steel

4140 Alloy Steel

RoHS

Compliant with Exemptions

DFARS Specialty Metals

REACH

Export Control Classification Number (ECCN)

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58,570 Products

Raw Materials

Steel

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

Stainless Steel

Stainless Steel

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

Aluminum

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

Brass

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

Bronze

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

Copper

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

Titanium

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

Tungsten

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

Nickel

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

Gold

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

Lead

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

Molybdenum

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

Plastic

A lightweight alternative to metal and glass

Niobium

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

Platinum

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

Cobalt

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

Glass

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

Foam

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

Tantalum

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

Rubber

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

Ceramic

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

Garolite

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

Felt

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

Wood

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

Fiberglass

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

Carbon Fiber

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

Mica

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

Wax

Create seals and prototypes, lubricate tools, and polish equipment

Graphite

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

Hard Fiber

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

Power Transmission

Shafts

Transmit power, motion, and speed between machine components

Ball Screw/Splines

Ball Screw/Splines

Transmit rotary power, move loads along the shaft, or do both at once

Disc Springs

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

Splines and Spline Bearings

Splines and Spline Bearings

Transmit rotary power or move loads along the length of splines

Bearing Lock Washers

Bearing Lock Washers

Lock bearing nuts in place to prevent loosening due to vibration

Fastening and Joining

Shims

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

Washers

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

Lock Washers

Resist vibration to prevent fasteners from loosening

Cushioning Washers

Cushioning Washers

Cushion joints to dampen vibration and protect them from wear

Sealing Washers

Sealing Washers

Prevent fluids from leaking around fasteners

Leveling Washers

Leveling Washers

Curved or tapered to compensate for uneven mounting surfaces

Finishing Washers

Finishing Washers

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

Insulating Washers

Insulating Washers

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

Cross-Bracing Washers

Cross-Bracing Washers

Connect cross-bracing rods or cables to structural beams; also known as hillside washers

Dowel Pins

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

Shear Pins

Use with shear hubs to break at a specific torque and safeguard machinery from overloads

Cotter Pins

Secure the ends of clevis pins and shafts to keep components in place

Quick-Release Pins

Quick-Release Pins

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

Weld Pins

Weld in place for greater rigidity and strength than other pins

Dowel Pin Stock

Dowel Pin Stock

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

Split Rings

Secure clevis pins, connect components, or add a pull handle; also known as key rings

Retaining Rings

Retaining Rings

Hold components on a shaft

Standoffs

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

Nails

Drive into wood, plastic, drywall, and masonry

Machine Keys

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

Screw Nails

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

Thread Adapters

Thread Adapters

Join threads of a different type, size, and gender

Anchors

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

Adhesive-Mount Nuts

Adhesive-Mount Nuts

Attach threads to material that’s too thin for a threaded insert

Tape

Bind, seal, and mark surfaces

Brazing Rings

Snap into metal pipe and tubing to form leak-resistant joints more quickly than with hand-fed alloys

Brazing Alloys

Form stronger bonds between metal parts than solder without melting the base material

Magnets

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

Electromagnets

Place on flat metal surfaces and turn on the power to create a magnetic hold

Adhesives

Bond surfaces together

Hook and Loop

Press interlocking pieces together to join materials

Snap-Together Fasteners

Snap-Together Fasteners

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

TIG Welding Rods

TIG Welding Rods

Add extra metal while TIG welding to help flatten welds and hold workpieces together

Solder

Join pieces of metal without melting the base material

Facility and Grounds Maintenance

Rebar

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

Floor Drain Covers

Floor Drain Covers

Put a lid on open drains to prevent accidents and injuries

Drain Cleanout Hole Covers

Drain Cleanout Hole Covers

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

Manhole Covers

Made of cast iron to handle high-volume foot and vehicle traffic.

Drain Cleanouts

Drain Cleanouts

Create an access point to inspect and clean floor drain pipelines

Paint Can Lid Rings

Paint Can Lid Rings

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

Building and Machinery Hardware

Bumpers

Absorb impact to protect equipment and surfaces from dents and scuffs

Antislip Tape

Add traction to floors, stairs, and other walking surfaces

Protective Feet

Protective Feet

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

Vibration-Damping Mounts

Vibration-Damping Mounts

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

Lockouts

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

Fluid Handling

Filter Mesh

Strain particles out of various substances

Sintered Filters

Sintered Filters

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

Corrosion-Inhibiting Rods and Pads

Corrosion-Inhibiting Rods and Pads

Protect tanks, water heaters, and heat exchangers from rust; also known as sacrificial anodes

Pressure-Relief Discs

Pressure-Relief Discs

Rupture at a set pressure or temperature to vent fluid and gas and protect machinery; one-time use

Heating Pads

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

Tube Fitting Markers

Tube Fitting Markers

Snap onto push-to-connect fittings to identify different tubing lines

Fabricating and Machining

Precision Knife Blades

Precision Knife Blades

Replace the blade in a precision knife

Circle Cutters

Create circular openings in drywall for pipes, conduit, and light fixtures

Grinding Wheels

Grinding Wheels

Add to grinders to remove material from work surfaces using abrasion

Grinding Bits

Pair with grinders for light material removal and precision grinding

Grinding Cones

For corners and the inside of castings, remove large amounts of material and leave a rough surface

Cutoff Wheels

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

Router Guides

Make precise circular or intricate cuts with routers

Rotary Tool Circle Cutters

Rotary Tool Circle Cutters

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

Buffing and Polishing Pads

Buffing and Polishing Pads

Remove imperfections and apply protective coatings on delicate surfaces

Buffing Kits

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

Rotary Tool Cutoff Wheels

Rotary Tool Cutoff Wheels

Replace the cutoff wheel on your Dremel rotary tool

Buffing and Polishing Wheels

Buffing and Polishing Wheels

Remove surface imperfections to achieve a precise, flat finish

Rotary Tool Blades

Rotary Tool Blades

Replace the blade on your Dremel rotary tool

Rotary Tool Accessories

Rotary Tool Accessories

Complete a wide range of cutting, grinding, and sanding tasks with your rotary tool

Rotary Tool Buffing and Polishing Kits

Rotary Tool Buffing and Polishing Kits

Buff, polish, and clean with rotary tools

Polishing Bonnets

Polishing Bonnets

Remove swirl marks and imperfections from a surface after buffing

Buffing and Polishing Applicator Bonnets

Buffing and Polishing Applicator Bonnets

Apply waxes and polishing compounds before buffing and polishing

Wire Brushes

Scrub by hand or connect to power tools to clean, polish, deburr, and remove rust

Cutoff Saw Wheels

Cutoff Saw Wheels

Replace the wheel on your cutoff saw

Spiral Saw Cutoff Wheels

Spiral Saw Cutoff Wheels

Attach to your RotoZip spiral saw to make straight cuts

Sanding Blocks

For better control than powered sanders, sand surfaces manually

Lapping Film

Polish workpieces without the mess of pastes and slurries

Sanding Disc Adapters

Sanding Disc Adapters

Swap between hook-and-loop and adhesive-backed sanding discs without also switching the sanding pad

Sanding Backup Pads

Sanding Backup Pads

Attach sanding discs to power tools and reinforce the discs

Sanding Discs

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

Sanding Pads

Reach into pipes, tubes, corners, and slots to smooth their surfaces and remove paint and rust

Sanding Disc Cushioning Pads

Sanding Disc Cushioning Pads

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

Clamp Holding Washers

Clamp Holding Washers

Replace worn washers on open-arm toggle clamps to keep holding screws in place

Sealing

O-Rings

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

10,732 products

Backup Rings

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

Tube Fitting Gaskets

Tube Fitting Gaskets

Prevent leaks when connecting sanitary tube fittings

Wear Rings

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

Communication

Tags

Hang throughout facilities to convey information

Labels

Stick onto items to identify or convey information about them

RFID Tags

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

Fire Hydrant Markers

Fire Hydrant Markers

Label fire hydrants to indicate their flow rate or status

Legend Plates

Mark switches and lights on control panels for easy identification

Floor Decals

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

DVDs

Record video for playback on a computer or DVD player

Stencils

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

CDs

Record audio for playback on a computer or stereo

Stamps

Mark surfaces such as metal, cardboard, paper, or fabric with indentations or ink

Signs

Everything from accident prevention to traffic control to exit signs

Measuring and Inspecting

Layout Compasses

Layout Compasses

Draw circles and transfer distance measurements

Compass Point-Holding Clamps

Compass Point-Holding Clamps

Attach to a pipe, ruler, or beam to scribe circles and arcs too large for a compass

Parallel Rules

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

Levels

Ensure surfaces are completely horizontal or vertical

Level Vials

Replace vials in levels or equipment

Bore Gauges

Insert into a hole and expand the contacts to measure diameter

Micrometer Check Gauges

Micrometer Check Gauges

Confirm your outside or depth micrometers are accurate

Metal Detector Calibration Kits

Metal Detector Calibration Kits

Test the sensitivity of food-processing metal detectors

Magnifiers

Workstation, hand-held, headband, and eyeglass magnifiers

Coordinate Measuring Machine Plates and Fixtures

Coordinate Measuring Machine Plates and Fixtures

Raise workpieces and position them on a fixture plate

Machine Vision Lights

Machine Vision Lights

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

Material Handling

Chain Rings

Join chains and add connectors for binding, towing, and lifting

Routing Rings

Suspend wire and cable by feeding it through the eyehole

Wheels

Move objects with ease

Tie-Down Washers

Tie-Down Washers

Angled sides align and hold tie-down straps

Safety Equipment

Safety Mirrors

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

Welding Lenses

Replace the lens in your welding helmet or goggles

Containers, Storage, and Furniture

Petri Dishes

Grow bacteria and other microorganisms

Drum Locking Rings

Drum Locking Rings

Clamp lids onto drums for a tight seal

Sanding Abrasive Dispensers

Sanding Abrasive Dispensers

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

Electrical

Battery-Terminal Washers

Battery-Terminal Washers

Stop battery acid fumes from corroding terminal posts

Electrical-Terminal Washers

Electrical-Terminal Washers

Prevent wires from slipping out from under screw heads to keep electrical connections intact

Lighting

Light Pipes

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

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)