Rings | McMaster-Carr

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Durometer 1A to Durometer 95A

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Specifications Met

Federal Specification

NFPA (National Fluid Power Association) Standard

Retaining Ring Type

48,038 Products

Most Likely Products

O-Rings

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

11,405 products

Retaining Rings

Hold components on a shaft

2,362 products

Split Rings

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

67 products

Chain Rings

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

148 products

Washers

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

5,158 products

All Results

Fastening and Joining

Retaining Rings

Hold components on a shaft

2,362 products

Split Rings

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

67 products

Washers

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

5,158 products

Sealing Washers

Prevent fluids from leaking around fasteners

752 products

Cushioning Washers

Cushion joints to dampen vibration and protect them from wear

167 products

Lock Washers

Resist vibration to prevent fasteners from loosening

1,659 products

Insulating Washers

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

277 products

Finishing Washers

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

156 products

Leveling Washers

Curved or tapered to compensate for uneven mounting surfaces

265 products

Cross-Bracing Washers

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

20 products

Shims

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

2,910 products

Cotter Pins

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

8 products

Quick-Release Pins

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

1,563 products

Spacers

Unthreaded to create space between two surfaces or objects, often to align them

20 products

Hog Rings

Squeeze closed using hog ring pliers to seal sacks, repair fences, and clip on tags

11 products

Safety Pins

Fasten tags, labels, and other objects to fabric without pricking yourself

3 products

Push Nuts

Press onto threads for a light duty hold that’s faster to install than typical nuts

65 products

Magnets

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

187 products

Socket Retaining Rings

Secure sockets and adapters to impact tools

39 products

Bearing Ring and Seal Drivers

Match the size of your bearing, bushing, or seal and strike with a hammer to install

2 products

Welding Lugs

Screw, hammer, or crimp on to secure welding cable connections

13 products

Material Handling

Chain Rings

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

148 products

Chain Connecting Links

Attach fittings to lift components or bind, tie down, and pull items

51 products

Eyebolts

Route rope through the loop or attach hooks and shackles for lifting

987 products

Eye Nuts

Pair with bolts or threaded rod to lift and hang components

111 products

Quick Links

Join rope, cable, and chain to secure loads

116 products

Carabiners

Hook onto rope and webbing to quickly connect objects, fittings, and other lengths of rope

228 products

Shackles

Lift, pull, and anchor heavy loads while keeping them secure with a pin

308 products

Hoist Rings

Pivot to resist stress that would bend or break an eyebolt when lifting at an angle

384 products

Snap Hooks

Spring, slide, or press open to quickly connect rope and chain

276 products

Ring Links

Bend, hammer, or twist closed to connect chain links and attach fittings

47 products

Webbing Rings

Add looped connection spots

20 products

Webbing Guides

Prevent webbing from twisting and use as anchor points; also known as footman's loops

21 products

Tie-Down Rings

Use as fixed anchor points

85 products

E-Track Couplings

Connect the ends of E-Track straps

1 product

E-Track Beam Brackets

Use with wood 2×4 beams between two E-Tracks to brace loads or add new levels to maximize space

1 product

E-Track Cargo Nets

Pair with E-Tracks to contain bulky loads against the sides of vans, trucks, and trailers

1 product

E-Track D-Rings

Add flexible connection points to E-Tracks for securing loads in different directions

3 products

E-Tracks

Add straps and other parts to keep cargo from moving inside vans and trucks; stronger than L-Tracks

12 products

E-Track Storage Bags

Attach to E-Tracks to hold objects

1 product

E-Track Webbing Guides

Secure webbing to E-Tracks and prevent it from twisting

1 product

E-Track Beams

Snap into place between two E-Tracks to brace loads or add new levels, maximizing vertical space

2 products

E-Track Straps

Add to E-Tracks to keep cargo from shifting inside vans and trailers; also known as logistic straps

16 products

L-Track Tie-Down Rings

Add pivoting connection points to L-Tracks to secure loads in different directions

3 products

L-Track Mounting Studs

Mount threaded accessories onto L-Tracks

3 products

Ratchet Straps

Connect to anchor points and tighten incrementally to increase the tension, holding cargo in place

64 products

Tie-Down Washers

Angled sides align and hold tie-down straps

5 products

U-Bolts

Anchor heavy pipe, tube, and conduit; stronger than routing clamps and hangers

1,069 products

U-Bolt Plates

Reinforce mounted U-bolts for a more secure hold

203 products

Pipe Hangers

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

592 products

Routing Rings

Suspend wire and cable by feeding it through the eyehole

40 products

Routing Ring Bases

Temporarily attach routing rings to steel and iron surfaces with a magnet

2 products

Loop Clamps

Hold pipe snug against the mounting surface to prevent movement that may cause breakage

478 products

Pipe Standoff Clamps

Secure pipes in sanitation drain applications and keep them from touching the mounting surface

22 products

Routing Clamps

Secure routed lines of pipe, tubing, and conduit

690 products

Routing Clamp Rails

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

14 products

Riser Clamps

Wide flanges support vertical pipe passing through floors

38 products

Routing J-Hooks

Hang, adjust, and remove bundles of cable through the wide opening more easily than with routing rings

16 products

Railing Clamps

Clamp onto metal tubes to hang lighting fixtures, threaded rod, and equipment

15 products

Pipe Cradles

Add support to prevent insulation from tearing when routing insulated pipe through loop hangers

20 products

Tow Eyes

Mount to trailers and connect to tow hooks or drawbar couplers on vehicles for towing

14 products

Tool Retractors

Hang tools and pull them down as needed; let go, and the cable pulls them up and out of the way

20 products

Hitch Inserts

Fit into hitch receivers and secure with a hitch pin to create a connection for towing

7 products

Sealing

O-Rings

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

11,405 products

Backup Rings

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

263 products

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

Pipe Gaskets

Form tight seals when connecting flanged pipe fittings

1,399 products

Hose Coupling Gaskets

Form tight seals on cam-and-groove, grip-lock, and twist-claw hose connections

94 products

Tube Fitting Gaskets

Prevent leaks when connecting sanitary tube fittings

428 products

Hose Washers

Place inside nozzles and spigots to prevent leaks in an attached hose

12 products

Drain Gaskets

Create a watertight seal between your drain and fixture without the mess of plumber's putty

3 products

Manway Gaskets

Create a tight seal between the nozzle and lid of tank car manways

8 products

Drum Gaskets

Seal lids onto steel and stainless steel drums

6 products

Drum Plug Gaskets

Form a tighter seal in drum openings than with a drum plug alone

7 products

Boiler Gaskets

Resist heat and steam to form a leak-resistant seal around closures on boilers

44 products

Piston Seals

Prevent leaks inside pistons by creating a seal against the cylinder bore

57 products

Shaft Seals

Prevent leaks in motors, pumps, and gearboxes

533 products

Wear Rings

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

54 products

Spring-Loaded Seals

Seal rods and pistons with a wider range of temperature and chemical resistance than U-cup seals

54 products

U-Cup Seals

With a lip on both the inside and outside edges, they can be used for sealing rods and pistons

198 products

Rod Wipers

Scrape dirt off rods to keep the inside of cylinders clean

109 products

Packing Seals

Fill in gaps around pump shafts, valve stems, and agitators to prevent leaks

231 products

Packing Seal Lubricating Rings

Install between layers of packing seals to distribute lubricants evenly; also known as lantern rings

8 products

Rod Seals

Maintain pressure inside cylinders and prevent fluid leaks

50 products

Head Seals

Maintain a seal even under fluctuating pressure; more reliable than an O-ring with a backup ring

11 products

Wear Ring Stock

Cut to make wear rings that fit any rod or bore to prevent uneven wear and extend the life of seals

12 products

Buffering Seals

Protect hydraulic cylinders from pressure spikes and shock in high-pressure applications

22 products

Shaft Repair Sleeves

Cover worn shafts with a smooth and protective sealing surface without machining

21 products

Cushioning Seals

Reduce wear and noise in air-powered cylinders by blocking the piston from hitting the cylinder body

5 products

Raw Materials

Foam

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

67 products

Aluminum

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

362 products

Plastic

A lightweight alternative to metal and glass

699 products

Steel

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

482 products

Stainless Steel

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

229 products

Rubber

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

253 products

Bronze

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

229 products

Glass

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

58 products

Carbon Fiber

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

101 products

Brass

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

120 products

Ceramic

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

161 products

Titanium

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

8 products

Garolite

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

289 products

Mica

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

6 products

Fiberglass

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

16 products

Copper

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

32 products

Hard Fiber

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

9 products

Communication

Tag Rings

Loop onto tags to attach them to lanyards, key rings, and other objects

59 products

Tags

Hang throughout facilities to convey information

57 products

Tube Fitting Markers

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

13 products

Name Badge Holders

Protect and display name badges on clips, lanyards, and bands

2 products

Facility and Grounds Maintenance

Toilet Sealing Rings

Prevent leaks where toilets mount to the floor or wall

8 products

Toilet Tank-to-Bowl Gaskets

Create a tight seal between a toilet tank and bowl

2 products

Toilet Mounts

Secure toilet components with flanges and hardware kits

11 products

Toilet Spuds

Connect wall-mount toilets to a flush valve

14 products

Urinal Sealing Rings

Prevent leaks where urinals mount to the wall

2 products

Urinal Flanges

Connect a urinal to your drainage system

2 products

Urinal Spuds

Connect wall-mount urinals to a flush valve

5 products

Flush Valve Replacement Parts

Replace virtually any part in the most common flush valve brands

2 products

Manhole Riser Rings

Raise a manhole cover to make it level with the surface

4 products

Building and Machinery Hardware

Grommets

Protect wire, cable, and cords from holes with sharp or rough edges

943 products

Turntables

Rotate to reposition machinery and equipment

33 products

Strut Channel Framing and Fittings

Secure fittings in the U-shaped channel to route conduit and pipe or build other structures

457 products

Key Holders

Group keys on a single ring for easy access

23 products

Key Racks

Store and quickly identify keys with color-coded and labeled tags

2 products

Pull Handles

Use a handle to open and close cabinets, drawers, and doors

15 products

Vibration-Damping Mounts

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

121 products

Push-to-Close Latches

Automatically hold doors shut when you push them closed

39 products

Cam Latches

Secure drawers, cabinets, mailboxes, and other enclosures

12 products

Brackets

Connect surfaces in an assembly

3 products

Power Transmission

Shaft Collars

Hold and position parts on a shaft, or limit shaft movement

2,802 products

Garter Springs

Exert radial force from all directions to maintain pressure on shafts or in seals

74 products

Turntable Bearings

Support machinery that slowly turns or oscillates, such as a rotating hoist

53 products

Bearing Lock Washers

Lock bearing nuts in place to prevent loosening due to vibration

103 products

Bearing Nuts

Hold bearings, bushings, pulleys, and gears in place on threaded shafts and spindles

412 products

Lead Screw Collars

Position components and limit travel along a lead screw

55 products

Rod End Seals

Keep dirt out and lubrication in to extend the life of rod ends

16 products

Cylinder Rod Glands

Replace the rod gland on hydraulic cylinders

15 products

Hydraulic Cylinder Seals

Replace seals on the piston or rod end of hydraulic cylinders

36 products

Torque Limiters

Keep torque at or below a set limit to control tension or braking or protect machinery from overload

43 products

Chain and Belt Tensioners

Control tension on your roller chain or belt for smooth operation and a long service life

13 products

Fluid Handling

Tube and Tube Fittings

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

396 products

Pipe and Pipe Fittings

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

46 products

Hose and Hose Fittings

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

7 products

Air Knives

Create a sheet of high-velocity air that dries, cleans, and cools parts and equipment

10 products

Containers, Storage, and Furniture

Curtain Hooks

Hang curtains from rods

8 products

Drum Locking Rings

Clamp lids onto drums for a tight seal

7 products

Electrical

Terminals, Ferrules, and Lugs

Attach to the end of wire to connect circuits in control panels, motors, and machinery

650 products

Battery-Terminal Washers

Stop battery acid fumes from corroding terminal posts

1 product

Slip Rings

Maintain an electrical link between a moving part and a stationary part

4 products

Electrical Cords

Connect equipment and devices to a power supply

5 products

Terminal and Splice Kits

Maintain a supply of extra terminals and splices to join and terminate wire

17 products

Conduit and Conduit Fittings

Protect wiring from impact and the environment in runs indoors, outdoors, and underground

148 products

Outlet Box Extenders

Add depth to an outlet box when there’s not enough space for components

50 products

Outlet Boxes

House electrical components such as on-off switches, receptacles, and dimmer knobs

6 products

Outlet Box Covers

Enclose wiring for outlets and switches or block off unused components

3 products

Heat-Shrink Tubing

Apply heat to seal and insulate electrical wiring and connections

3 products

Electrical-Terminal Washers

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

6 products

Ferrite Cores

Create magnetic hold by wrapping with magnet wire and energizing; use as inductors and transformers

4 products

Wire and Cable Stripper Blades

Snap into cordless wire strippers to quickly and safely remove insulation

30 products

Heating, Ventilation, and Air Conditioning

Duct Flanges

Mount on equipment to start a run of duct, or create a secure joint between two sections

169 products

Safety Equipment

Fall-Arrest Harness Lanyard Holders

Attach to your harness to hold unused lanyards out of the way

2 products

Fall-Arrest Extension Straps

Hook to the D-ring on your harness to make it easier to attach a fall-arrest lanyard

6 products

Tool Lanyards

Tether tools to your harness so they don't fall if dropped

13 products

Fall-Arrest Anchors

Fasten to a beam or ceiling and your fall-arrest lanyard to catch you if you fall

25 products

Tool Tether Attachments

Slide onto tools to connect them to equipment lanyards

9 products

Fall-Rescue Packs

Clip onto your fall-arrest harness to lower yourself to safety after a fall

1 product

Fall-Rescue Kits

Everything you need to rescue a person who is suspended after a fall

2 products

Chain Barrier Links

Split in half and snap back together to securely connect lengths of chain

6 products

Glove Box Clamps

Secure gloves to glove boxes

2 products

Life Preservers

Keep people afloat and visible to rescuers

2 products

Measuring and Inspecting

Ring Gauges

Confirm your workpiece's outer diameter or external threads are within tolerance

854 products

Ring Gauge Holders

Keep ring gauges still to measure cylindrical parts or threads quickly and repeatedly

17 products

O-Ring Gauges

Identify the size of your O-ring

4 products

Current Indicating Rings

Run wire through rings to monitor AC current flow

5 products

Fabricating and Machining

Clamp Holding Washers

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

12 products