Bearing Retainers | McMaster-Carr

With a nylon insert that grips your threaded shaft or spindle without damaging the threads, these locknuts—sometimes called shaft nuts—keep bearings, bushings, gears, and pulleys in place.

Bearing Retaining Nuts

Often paired with spring lock washers to strengthen their hold, these retaining nuts—also known as shaft nuts—keep vibration from shifting bearings, bushings, pulleys, and gears on your threaded shaft or spindle.

Bearing Retaining Jam Nuts

Used in pairs or with another bearing retaining nut, these jam nuts—often called shaft nuts—hold bearings, bushings, pulleys, and gears in place on your threaded shaft or spindle.

Clamping Shaft Collars

These metal collars are stronger than plastic shaft collars.

Washdown Clamping Shaft Collars

Suitable for use in washdown applications, these plastic collars also offer good chemical resistance.

Machinable-Bore Clamping Shaft Collars

Customize the bore of these collars to precisely fit your shaft.

Quick-Connect Clamping Shaft Collars

Internal ball bearings allow you to slide a collar onto your shaft in one direction and then automatically lock the collar in place in the opposite direction.

Ultra-Grip Clamping Shaft Collars

An embedded sleeve squeezes the shaft as you tighten the clamping screws, allowing these collars to handle up to three times the thrust load of standard collars.

Precision Adjustable-Width Clamping Shaft Collars

Two knurled sides provide micrometer-like movement for precise width adjustments.

Quick-Release Clamping Shaft Collars

Installing and removing a collar is as easy as pushing down and lifting up a clamp lever.

Extra-Grip Clamping Shaft Collars

With larger clamping screws than those found on standard clamping collars, these provide a stronger grip on your shaft without using additional screws.

Clamping Shaft Collars with Precision-Ground Face

One side of these collars locks down like a standard one-piece shaft collar; the other has a flush face that's flat to 0.0005", which lets you mount the collars on a shaft next to precision bearings, sprockets, and gears.

Extra-Wide Clamping Shaft Collars

Wider than standard shaft collars with twice the number of clamping screws, these ensure a better grip for greater holding power.

Counterbalanced Clamping Shaft Collars

Formed to offset the weight of the clamping screw, these collars won't wobble or vibrate when shafts are spinning—even at high speeds.

Tight-Hold Quick-Release Clamping Shaft Collars

A threaded lever lets you tighten these collars with more torque than other quick-release styles, ensuring that they stay put on your shaft.

Set Screw Shaft Collars

Keep these shaft collars in place by tightening their set screw into the shaft.

Washdown Set Screw Shaft Collars

Made of chemical-resistant nylon, these collars are suitable for washdown applications.

Clamping Two-Piece Shaft Collars

These metal collars are stronger than plastic shaft collars.

Washdown Clamping Two-Piece Shaft Collars

Suitable for use in washdown applications, these plastic collars also offer good chemical resistance.

Machinable-Bore Clamping Two-Piece Shaft Collars

Customize the bore of these collars to precisely fit your shaft.

Extra-Grip Clamping Two-Piece Shaft Collars

With larger screws than those found on standard clamping collars, these provide a stronger grip on your shaft without using additional screws.

Quick-Release Two-Piece Clamping Shaft Collars

Make quick adjustments to these shaft collars with a lever on the side.

Extra-Wide Clamping Two-Piece Shaft Collars

Wider than standard shaft collars with twice the number of clamping screws, these ensure a better grip for greater holding power.

Inch-to-Metric Clamping Two-Piece Shaft Collars

Although these collars fit inch-sized shafts, they have a metric OD and width for use with metric equipment.

Clamping Two-Piece Shaft Collars with Wrench Flats

Use a wrench to rotate your drive shaft without marring or gouging the shaft.

Set Screw Two-Piece Shaft Collars

Tighten the set screw to bite into an unhardened shaft for a secure hold.

Hinged Shaft Collars

Offering the benefits of a two-piece collar in a one-piece design, these collars swing open for positioning then close anywhere on your shaft.

Flange-Mount Shaft Collars

Three tapped counterbored holes and three through-holes provide mounting flexibility.

Face-Mount Shaft Collars

Two tapped holes on the face of these collars allow you to fasten them to gears, pulleys, and sprockets.

Machinable-Face Shaft Collars

These collars have two different sides—one locks down like a standard clamping shaft collar; the other has a flush face that you can machine to add slots, holes, and grooves to match your special setups.

Weldable Shaft Collars

To install, slide these one-piece collars onto the end of your shaft.

Weldable Two-Piece Shaft Collars

Install these collars anywhere on a shaft without removing components or having access to the ends of the shaft.

Top-and-Bottom Mount Two-Piece
Quick-Release Clamping Shaft Collars

Mount items to either half of these collars and quickly adjust their position on shafts with a lever on the side. The two halves separate, so you can install them anywhere on a shaft without removing components or having access to the end.

Top-and-Bottom Mount
Quick-Release Clamping Shaft Collars

Attach items to tapped holes at either end of these collars and twist the lever to quickly move them along shafts.

Top-and-Bottom Mount Two-Piece Shaft Collars

Secure items to either side of these collars—each half has a flat end with a tapped hole

Top-and-Bottom Mount Shaft Collars

Mount these collars flush against each other or attach components to either side—the round body has flattened ends with tapped holes.

D-Profile Shaft Collars

To install, slide these one-piece collars onto the end of your shaft.

Hex Two-Piece Shaft Collars

Install these collars anywhere on a shaft without removing components or having access to the ends of the shaft.

Support-Rail Two-Piece Shaft Collars

Install these collars anywhere on a shaft without removing components or having access to the ends of the shaft.

D-Profile Two-Piece Shaft Collars

Install these collars anywhere on a shaft without removing components or having access to the ends of the shaft.

Support-Rail Shaft Collars

Slide these one-piece collars onto the end of your shaft to create an end-stop for linear components.

Hex Shaft Collars

To install, slide these one-piece collars onto the end of your shaft.

Threaded Shaft Collars

To install, thread these one-piece collars onto the end of your shaft.

Threaded Two-Piece Shaft Collars

Install these collars anywhere on a shaft without removing components or having access to the ends of the shaft.

Quick-Release Shaft Collar Handles

These threaded handles take the place of a set screw, allowing you to move set screw shaft collars without additional tools—useful for when the collar serves as a stroke limiter or mounting clamp.

Square Shaft Collars

Install these two-piece collars square shafts.

Machinable Shaft Ends

One side is unfinished for milling custom pulleys, threaded hubs, sprockets, collars, knobs, sensor targets, or just about anything imaginable; the other side is a one-piece clamping coupling for mounting whatever you’ve created to your shaft.

Internal Retaining Rings

Squeeze these rings to place them in the groove inside a bore or housing.

Inverted Internal Retaining Rings

For a smooth bore and better clearance than standard internal retaining rings, the lugs on these rings face outward.

Heavy-Duty Internal Retaining Rings

Thicker and stronger than standard internal retaining rings, these withstand greater thrust loads.

Bowed Internal Retaining Rings

The curved design of these rings works like a spring, taking up play for a tight hold.

Internal Teeth Retaining Rings

With teeth along the inside, these retaining rings hold chamfered shafts inside the housing of your equipment.

Push-On Internal Retaining Rings

No groove required—these rings have teeth that firmly grip the bore.

Single-Turn Spiral Internal Retaining Rings

Slide these rings into place by hand with a single twist for applications with high thrust loads.

Spiral Internal Retaining Rings

These coiled rings can be wound into place inside a bore or housing without tools.

Heavy Duty Spiral Internal Retaining Rings

Thicker than standard spiral rings, these rings withstand greater forces.

External Retaining Rings

Open these rings, pass them over the end of a shaft, and release to spring into the groove.

Heavy Duty External Retaining Rings

Thicker than standard external retaining rings, these rings withstand greater force.

Mil. Spec. External Retaining Rings

These rings meet military specification MS 16624.

Bowed External Retaining Rings

The curved design of these rings works like a spring, taking up play for a tight hold.

Self-Locking External Retaining Rings

No groove is required for these rings—their thick profile helps them grip the shaft.

Inverted External Retaining Rings

For a smooth profile and better clearance than standard external retaining rings, the lugs on these rings point inward.

Spiral External Retaining Rings

These coiled rings can be wound into place on a shaft without tools.

Heavy Duty Spiral External Retaining Rings

Thicker than standard spiral rings, these rings withstand greater forces.

Single-Turn Spiral External Retaining Rings

Slide these rings into place with one twist—no tools required—for applications with high thrust loads.

Low-Clearance External Retaining Rings

Also known as constant-section rings, these rings have open ends and a profile that does not taper like other external retaining rings. Use them with linear bearings on support rail shafts.

Speared Ends External Retaining Rings

Often used with small engines, heavy equipment, and power transmission, these external retaining rings have speared ends to help you install and remove them.

Push-On External Retaining Rings

No groove required—press these rings onto the end of a shaft for a firm grip.

Push-On Retaining Caps

Use these caps to hold components in place and protect shaft ends.

Flanged Push-On External Retaining Rings

The wide flange provides better load distribution than standard external push rings and can be used to cover oversized holes. Also known as thread cutting nuts.

Rectangular Push-On External Retaining Rings

Also known as flat-style speed nuts, these have a large surface to distribute loads better than standard and flanged external push rings.

Side-Mount External Retaining Rings

Also known as E-style rings.

Heavy Duty Side-Mount External Retaining Rings

These rings are reinforced to withstand faster rotation than other side-mount retaining rings. Also known as reinforced E-style rings.

Wide-Grip Side-Mount External Retaining Rings

Also known as poodle rings, these thick rings have "ears" that form a large retaining surface to withstand stronger forces than other side-mount retaining rings.

Low-Clearance Side-Mount External Retaining Rings

Also known as C-style and crescent rings, these rings have a small shoulder to fit in tight spaces.

Bowed Side-Mount External Retaining Rings

Also known as bowed E-style rings, these have a curved design that works like a spring, taking up play for a tight hold.

Clip-On External Retaining Rings

Slide these rings into a groove near the end of the shaft and the tab locks them in place.

Crimp-On External Retaining Rings

Also known as X-washers, place these rings into the groove and squeeze tight with pliers to form a 360° closure.

Fastener Assortments

Internal Push Ring Assortments

External Push Ring Assortments

External and Internal Spiral Retaining Ring Assortments

Wind these retaining rings into a groove—no tools required for installation.

External Retaining Ring Assortments

Pull these rings open with retaining ring pliers, pass over the end of a shaft, and release to spring into a groove.

Side-Mount External Retaining Ring Assortments

Also known as E-Style and C-style rings, slide these into the groove from the side of the shaft. They provide a wider shoulder than other external retaining rings for a larger retaining surface.

External and Side-Mount Retaining Ring Assortments

Assortments include pliers to install external rings.

Internal Retaining Ring Assortments

Pull ring ends together with retaining ring pliers and place into the bore of a shaft or housing.

External, Internal, and Side-Mount
Retaining Ring Assortments

These assortments include pliers to install external and internal rings.

External and Internal Retaining Ring Assortments

Assortments include pliers to install external and internal rings.

Push Nuts

Hex Push Nuts

Hex push nuts can be gripped with a wrench for ease of removal.

Rectangular Push Nuts for Tapping Screws

Metric Round Push Nuts

These metric push nuts can be used as a standalone for light-duty applications or as a jam nut.

Round Push Nuts

With flexible teeth that slide smoothly over threads of any pitch, these push nuts can be used alone for light-duty applications or as a jam nut.

Flanged Push Nuts

A flange distributes the load over a large area and reduces stress where the nut meets the material surface.

Rectangular Push Nuts

Also known as flat-style speed nuts, these have large sides, so they're easy to push over threads by hand.

Lead Screw Collars

Clamping Acme Lead Screw Collars

Thread these one-piece collars onto an Acme lead screw.

Two-Piece Clamping Acme Lead Screw Collars

Mount these two-piece collars anywhere on an Acme lead screw without removing components.

Metric Clamping Acme Lead Screw Collars

Install these threaded collars on a metric lead screw to separate and position components, or use them as an end stop to limit travel.

Tag Rings

Loop these rings onto tags.

Fastening Tools

Push Nut Installation Tools

Push nuts and retaining rings over threaded fasteners and shafts. These tools have a magnetized tip so nuts don't fall off as you slide them on.

About Shaft Collars

Shaft Collars

Bearing Retaining Locknuts

Bearing Retaining Nuts

Bearing Retaining Jam Nuts

Clamping Shaft Collars

Washdown Clamping Shaft Collars

Machinable-Bore Clamping Shaft Collars

Quick-Connect Clamping Shaft Collars

Ultra-Grip Clamping Shaft Collars

Precision Adjustable-Width Clamping Shaft Collars

Quick-Release Clamping Shaft Collars

Extra-Grip Clamping Shaft Collars

Clamping Shaft Collars with Precision-Ground Face

Extra-Wide Clamping Shaft Collars

Counterbalanced Clamping Shaft Collars

Tight-Hold Quick-Release Clamping Shaft Collars

Set Screw Shaft Collars

Washdown Set Screw Shaft Collars

Clamping Two-Piece Shaft Collars

Washdown Clamping Two-Piece Shaft Collars

Machinable-Bore Clamping Two-Piece Shaft Collars

Extra-Grip Clamping Two-Piece Shaft Collars

Quick-Release Two-Piece Clamping Shaft Collars

Extra-Wide Clamping Two-Piece Shaft Collars

Inch-to-Metric Clamping Two-Piece Shaft Collars

Clamping Two-Piece Shaft Collars with Wrench Flats

Set Screw Two-Piece Shaft Collars

Hinged Shaft Collars

Flange-Mount Shaft Collars

Face-Mount Shaft Collars

Machinable-Face Shaft Collars

Weldable Shaft Collars

Weldable Two-Piece Shaft Collars

Top-and-Bottom Mount Two-PieceQuick-Release Clamping Shaft Collars

Top-and-Bottom MountQuick-Release Clamping Shaft Collars

Top-and-Bottom Mount Two-Piece Shaft Collars

Top-and-Bottom Mount Shaft Collars

D-Profile Shaft Collars

Hex Two-Piece Shaft Collars

Support-Rail Two-Piece Shaft Collars

D-Profile Two-Piece Shaft Collars

Support-Rail Shaft Collars

Hex Shaft Collars

Threaded Shaft Collars

Threaded Two-Piece Shaft Collars

Quick-Release Shaft Collar Handles