Collars | McMaster-Carr

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20,924 Products

Power Transmission

Shaft Collars

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

Shaft Couplings

Shaft Couplings

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

Bore Reducers

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

Lead Screws and Nuts

Lead Screws and Nuts

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

Bearing Nuts

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

Bearing Adapter Sleeves

Bearing Adapter Sleeves

Close gaps between your bearing and shaft for a tight fit

Fastening and Joining

Spacers

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

Insulating Washers

Insulating Washers

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

Washers

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

Cross-Bracing Washers

Cross-Bracing Washers

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

Finishing Washers

Finishing Washers

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

Push-Button Nuts

Push-Button Nuts

Disengage the threads to quickly slide along threaded rods

Flange Nuts

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

Easy to tighten and loosen by hand for making frequent adjustments

Weld Nuts

Weld to metal surfaces to add permanent threads

Adhesive-Mount Nuts

Adhesive-Mount Nuts

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

Push Nuts

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

Shims

Level, align, and adjust spacing on fasteners, shafts, and machine components

Retaining Rings

Retaining Rings

Hold components on a shaft

Unthreaded Inserts

Unthreaded Inserts

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

Fabricating and Machining

Drill Bushings

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

Drill Stops

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

Drill Chuck Replacement Parts

Drill Chuck Replacement Parts

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

Countersinks

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

Counterbores

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

Heating, Ventilation, and Air Conditioning

Duct and Duct Fittings

Duct and Duct Fittings

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

Diffuser Collars

Diffuser Collars

Connect diffusers to duct

Chimney Pipe and Fittings

Chimney Pipe and Fittings

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

Exhaust Fan Collars

Exhaust Fan Collars

Connect exhaust fans to louvers

Exhaust Fans

Draw stagnant and humid air out of a room or area

Raw Materials

Plastic

A lightweight alternative to metal and glass

Stainless Steel

Stainless Steel

Resists corrosion and chemicals in most environments

Building and Machinery Hardware

Clamp-On Framing and Fittings

Clamp-On Framing and Fittings

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

Slip-On Framing and Fittings

Slip-On Framing and Fittings

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

T-Slotted Framing and Fittings

T-Slotted Framing and Fittings

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

Flush-Fit Framing and Fittings

Flush-Fit Framing and Fittings

Create smooth stair and platform railings by sliding fittings into rails and tightening the screws

Press-Fit Framing and Fittings

Press-Fit Framing and Fittings

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

Adjustable Handles

Adjustable Handles

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

Grommets

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

Padlock Hanging Chains

Padlock Hanging Chains

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

Fluid Handling

Pipe and Pipe Fittings

Pipe and Pipe Fittings

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

Tube and Tube Fittings

Tube and Tube Fittings

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

Tube Fitting Markers

Tube Fitting Markers

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

Hose and Hose Fittings

Hose and Hose Fittings

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

Facility and Grounds Maintenance

Floor, Wall, and Ceiling Plates

Floor, Wall, and Ceiling Plates

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

Toilet Mounts

Secure toilet components with flanges and hardware kits

Toilet Seat Fasteners

Toilet Seat Fasteners

Secure toilet seat hinges to your toilet bowl

Urinal Flanges

Connect a urinal to your drainage system

Material Handling

Pipe Hangers

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

Safety Equipment

Cover Plates for Fire Sprinkler Heads

Cover Plates for Fire Sprinkler Heads

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

Fire Stops

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

Tool Holding Rings

Tool Holding Rings

Slide onto tools to connect them to equipment lanyards

Sealing

Pipe Flashings

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

Measuring and Inspecting

Ring Gauge Holders

Ring Gauge Holders

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

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