Collars | McMaster-Carr

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System of Measurement

Shaft Diameter

Material

Construction

Shaft Mount Type

Shaft Type

Round with Support Rail

Width

Finish

Aluminum-Zinc Alloy Coated

Anodized

Black Oxide

Cadmium Plated

Cadmium Yellow-Chromate Plated

Chrome Plated

Corrosion-Resistant Coated

Clamping Screw Material

Length

Number of Clamping Screws Included

Set Screw Material

Shaft Width

Screw Size

Thread Size

Export Control Classification Number (ECCN)

DFARS Specialty Metals

REACH

RoHS

Compliant with Exemptions

Not Compliant

Number of Set Screws Included

Keyway Width

Shape

Clamping Screw Finish

Color

21,401 Products

Power Transmission

Shaft Collars

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

2,803 products

Shaft Couplings

Connect two shafts to transfer rotary motion from one to the other

696 products

Bore Reducers

Adapt the bore of a component to a smaller size for mounting on a shaft

31 products

Lead Screws and Nuts

Components travel along a screw with broad, square threads to clamp and lift heavy loads

220 products

Bearing Nuts

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

412 products

Bearing Adapter Sleeves

Close gaps between your bearing and shaft for a tight fit

29 products

Fastening and Joining

Spacers

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

4,795 products

Insulating Washers

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

267 products

Washers

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

11 products

Cross-Bracing Washers

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

20 products

Finishing Washers

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

5 products

Flange Nuts

The flange distributes pressure, so you don't need a washer

769 products

Push-Button Nuts

Disengage the threads to quickly slide along threaded rods

5 products

Thumb Nuts

Easy to tighten and loosen by hand for making frequent adjustments

145 products

Adhesive-Mount Nuts

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

162 products

Weld Nuts

Weld to metal surfaces to add permanent threads

308 products

Push Nuts

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

9 products

Shims

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

2,910 products

Retaining Rings

Hold components on a shaft

8 products

Unthreaded Inserts

Reinforce, align, and adjust joints as you tighten a fastener

69 products

Fabricating and Machining

Drill Bushings

Fit in holes to guide drill bits and other cutting tools for precise and repeatable holes and cuts

3,782 products

Drill Stops

Limit how far bits can drill to create identical hole depths every time

145 products

Countersinks

Cut a cone-shaped opening in a hole to install flat-head screws and rivets flush with the surface

61 products

Counterbores

Enlarge the top of a hole to install socket and hex head screws flush with the surface

29 products

Drill Chuck Replacement Parts

Replace collars, shells, ball bearings, and other parts on drill chucks

7 products

Heating, Ventilation, and Air Conditioning

Duct and Duct Fittings

Circulate air through HVAC systems using round, rectangular, and fabric duct

250 products

Diffuser Collars

Connect diffusers to duct

4 products

Chimney Pipe and Fittings

Exhaust hot air and fumes from boilers, furnaces, and stoves

12 products

Exhaust Fan Collars

Connect exhaust fans to louvers

17 products

Exhaust Fans

Draw stagnant and humid air out of a room or area

51 products

Building and Machinery Hardware

Clamp-On Framing and Fittings

Two-piece fittings let you modify assembly stations, conveyors, and racks without dismantling them

203 products

Slip-On Framing and Fittings

Insert rails into fittings and tighten screws to make guards, railings, and racks

111 products

T-Slotted Framing and Fittings

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

2 products

Flush-Fit Framing Rail Ends

Secure flush-fit framing structures to floors, walls, and ceilings

3 products

Press-Fit Framing and Fittings

Set up temporary partitions, guards, and displays using only a hammer

6 products

Adjustable Handles

Lift and turn to easily position and tighten components; also called clamping handles

21 products

Grommets

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

43 products

Padlock Hanging Chains

Attach padlocks that aren't in use to walls and workstations to prevent losing them

9 products

Raw Materials

Stainless Steel

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

229 products

Plastic

A lightweight alternative to metal and glass

699 products

Fluid Handling

Pipe and Pipe Fittings

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

1,407 products

Tube and Tube Fittings

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

75 products

Hose and Hose Fittings

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

26 products

Tube Fitting Markers

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

13 products

Material Handling

Pipe Hangers

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

76 products

Facility and Grounds Maintenance

Floor, Wall, and Ceiling Plates

Add a finishing touch around protruding pipes; also known as escutcheons

46 products

Toilet Mounts

Secure toilet components with flanges and hardware kits

11 products

Toilet Seat Fasteners

Secure toilet seat hinges to your toilet bowl

1 product

Urinal Flanges

Connect a urinal to your drainage system

2 products

Manhole Riser Rings

Raise a manhole cover to make it level with the surface

4 products

Safety Equipment

Fire Stops

Prevent fire and smoke from passing through holes in fire-resistant walls and floors

4 products

Cover Plates for Fire Sprinkler Heads

Replace the cover on your fire sprinkler head for a clean look; also known as escutcheons

12 products

Tool Tether Attachments

Slide onto tools to connect them to equipment lanyards

12 products

Sealing

Pipe Flashings

Create watertight seals around vent pipes on roofs, even if they expand, contract, and vibrate

13 products

Measuring and Inspecting

Ring Gauge Holders

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

17 products