Hoops | McMaster-Carr

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Pipe Size

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30,744 Products

Most Likely Products

Chain Rings

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

149 products

Tie-Down Rings

Use as fixed anchor points

85 products

Hoist Rings

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

384 products

Loop Clamps

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

478 products

Retaining Rings

Hold components on a shaft

2,362 products

Duct Flanges

Mount on equipment to start a run of duct, or make a connection between two duct ends

169 products

All Results

Material Handling

Chain Rings

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

149 products

Chain Connecting Links

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

51 products

Hoist Rings

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

384 products

Quick Links

Screw the nut closed to join lengths of chain and add connectors

116 products

Ring Links

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

47 products

Snap Hooks

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

278 products

Loop Clamps

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

478 products

Pipe Hangers

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

336 products

Pipe Standoff Clamps

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

22 products

Routing Rings

Suspend wire and cable by feeding it through the eyehole

42 products

Routing Clamps

Secure routed lines of pipe, tubing, and conduit

1,153 products

Routing J-Hooks

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

16 products

Riser Clamps

Wide flanges support vertical pipe passing through floors

30 products

Tie-Down Rings

Use as fixed anchor points

85 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

E-Track D-Rings

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

3 products

Tie-Down Washers

Angled sides align and hold tie-down straps

5 products

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

5,156 products

Lock Washers

Resist vibration to prevent fasteners from loosening

1,660 products

Leveling Washers

Curved or tapered to compensate for uneven mounting surfaces

265 products

Insulating Washers

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

277 products

Sealing Washers

Prevent fluids from leaking around fasteners

751 products

Cushioning Washers

Cushion joints to dampen vibration and protect them from wear

167 products

Finishing Washers

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

156 products

Cross-Bracing Washers

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

20 products

Cotter Pins

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

8 products

Hog Rings

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

11 products

Socket Retaining Rings

Secure sockets and adapters to impact tools

39 products

Sealing

O-Rings

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

10,708 products

O-Ring Cord Stock

Cut to length to create customized seals

295 products

Backup Rings

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

263 products

O-Ring Bonding Kits

Everything needed to make O-rings

7 products

Pipe Gaskets

Form tight seals when connecting flanged pipe fittings

1,393 products

Tube Fitting Gaskets

Prevent leaks when connecting sanitary tube fittings

428 products

Manway Gaskets

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

8 products

Hose Washers

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

10 products

Boiler Gaskets

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

44 products

Hose Coupling Gaskets

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

94 products

Drain Gaskets

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

3 products

Packing Seal Lubricating Rings

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

8 products

Packing Seals

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

47 products

Spring-Loaded Seals

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

54 products

Cushioning Seals

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

5 products

Head Seals

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

11 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

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

U-Cup Seals

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

198 products

Shaft Repair Sleeves

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

21 products

Piston Seals

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

57 products

Rod Seals

Maintain pressure inside cylinders and prevent fluid leaks

50 products

Buffering Seals

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

22 products

Rod Wipers

Scrape dirt off rods to keep the inside of cylinders clean

109 products

Heating, Ventilation, and Air Conditioning

Duct Flanges

Mount on equipment to start a run of duct, or make a connection between two duct ends

169 products

Communication

Tag Rings

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

59 products

Name Badge Holders

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

1 product

Building and Machinery Hardware

Grommets

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

941 products

Key Racks

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

2 products

Vibration-Damping Mounts

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

105 products

Electrical

Electrical-Terminal Washers

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

6 products

Terminal and Splice Kits

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

17 products

Electrical Cords

Connect equipment and devices to a power supply

4 products

Heat-Shrink Tubing

Apply heat to seal and insulate electrical wiring and connections

3 products

Battery-Terminal Washers

Stop battery acid fumes from corroding terminal posts

1 product

Terminals

Attach wire endings everywhere from circuit breaker panels to batteries

344 products

Electrical Enclosure Pole Mounts

Everything you need to secure enclosures to round poles or beams

14 products

Electrical Enclosure Floor Stands

Mount enclosures to the floor above hazards such as water

8 products

Measuring and Inspecting

O-Ring Gauges

Identify the size of your O-ring

4 products

Raw Materials

Foam

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

21 products

Safety Equipment

Chain Barrier Links

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

6 products

Fabricating and Machining

Clamp Holding Washers

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

12 products

Fluid Handling

Pipe and Pipe Fittings

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

24 products

Tube and Tube Fittings

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

33 products

Power Transmission

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

Rod End Seals

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

16 products

Bearing Lock Washers

Lock bearing nuts in place to prevent loosening due to vibration

103 products

Facility and Grounds Maintenance

Toilet Spuds

Connect wall-mount toilets to a flush valve

14 products

Urinal Spuds

Connect wall-mount urinals to a flush valve

5 products

Toilet Tank-to-Bowl Gaskets

Create a tight seal between a toilet tank and bowl

2 products

Toilet Sealing Rings

Prevent leaks where toilets mount to the floor or wall

8 products

Flush Valve Replacement Parts

Replace virtually any part in the most common flush valve brands

5 products

Urinal Sealing Rings

Prevent leaks where urinals mount to the wall

2 products

Manhole Riser Rings

Raise a manhole cover to make it level with the surface

4 products

Urinal Flanges

Connect a urinal to your drainage system

2 products