Shaft Washers | McMaster-Carr

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Ring OD Ring OD

	Magnetic Properties Magnetic Properties

Magnetic

May Be Mildly Magnetic

Nonmagnetic

	Minimum Hardness Minimum Hardness

	For Groove Width For Groove Width

	Finish Finish

Black Phosphate

Zinc Plated

Oil Coated

Zinc Yellow-Chromate Plated

Zinc-Chromate Plated

Black Oxide

Cadmium Plated

Corrosion-Resistant-Coated

Nickel Plated

	Specifications Met Specifications Met

	Ring ID Ring ID

6,900 Products

Round Shims

Ring Shims

Precisely align, level, and adjust spacing on fasteners and shafts with these shims.

Ring Shim Sets

Be prepared with ring shims in a variety of thicknesses. These shims fit around fasteners and shafts to precisely align, level, and adjust spacing.

Wide-Rim Ring Shims

Also known as machinery bushings, these shims have an oversized OD to create a larger bearing surface for reduced wear between moving parts.

Tight-Fit Ring Shims

For a snug fit around a shaft, the ID of these shims is held to a tighter tolerance than other round shims.

Color-Coded Ring Shims

Precisely align, level, and adjust spacing on fasteners, shafts, and machinery with these shims, which are color-coded by thickness for easy identification.

Peel-Away Layered Ring Shims

These shims are made of layers of metal bonded with adhesive. Remove layers with a utility knife until you get the thickness you need.

Color-Coded Ring Shim Sets

Be prepared with ring shims in a variety of thicknesses. These shims are color-coded by thickness for easy identification.

Shims for Shortening Screw Shoulders

Slide these shims under the screw head to shorten the shoulder length.

Shims for Lengthening Screw Shoulders

Spin these shims onto screw threads to extend the shoulder length.

Shims for Ball Bearings

Adjust spacing between bearings and other components on shafts. These shims are sized to fit the outer rim of a bearing.

Shims for Ball Bearing Housings

Also called tolerance rings, these rings are for use in stamped, molded, or worn housings to form a tight hold on the bearings.

Shims for D-Profile Shafts

These shims are shaped to fit over D-profile shafts. Use them to precisely align, level, and adjust spacing.

Shim Sets for D-Profile Shafts

Be prepared with shims in a variety of thicknesses. These shims are shaped to fit over D-profile shafts. Use them to precisely align, level, and adjust spacing.

Shim Sets for Keyed Shafts

Be prepared with shims in a variety of thicknesses. Also known as arbor spacers, these shims are notched to fit over keyed shafts.

Shims for Keyed Shafts

Precisely shaped to fit snugly on keyed shafts, these shims align, level, and space components. Because of their tight fit, they also help components rotate in unison with the shaft.

Shims for Button Dies

Place these shims under sharpened dies to restore their original height and extend their life.

External Retaining Rings

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.

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.

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.

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.

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.

Bowed External Retaining Rings

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

Side-Mount External Retaining Rings

Also known as E-style 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.

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.

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.

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.

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.

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.

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.

Single-Turn Spiral External Retaining Rings

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

Spiral External Retaining Rings

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

Clip-On External Retaining Rings

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

Heavy Duty Spiral External Retaining Rings

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

Internal Retaining Rings

Push-On Internal Retaining Rings

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

Heavy-Duty Internal Retaining Rings

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

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.

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.

Heavy Duty Spiral Internal Retaining Rings

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

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.

Push Ring Assortments

External Push Ring Assortments

Internal Push Ring Assortments

Retaining Ring Assortments

External, Internal, and Side-Mount
Retaining Ring Assortments

These assortments include pliers to install external and internal rings.

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.

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.

External and Internal Retaining Ring Assortments

Assortments include pliers to install external and internal rings.

Internal Retaining Ring Assortments

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

Ring Shim Assortments

Shim Assortments for Shortening Shoulder Screws

Slide onto a shoulder screw to shorten the length of the shoulder.

Ring Shim Assortments

Use round shims to precisely align, level, and adjust spacing on shafts and machinery.

Shim Assortments for Lengthening Shoulder Screws

Spin these tight-fitting shims onto your screw's threads to lengthen the shoulder.

Shim Assortments for Button Dies

Place these shims under sharpened dies to restore their original height and extend the life of the dies.

Unthreaded Spacers for Keyed Shafts

Also known as arbor spacers, these are notched to space components on a keyed shaft.

Spring Lock Washers for Slotted Bearing Nuts

Designed for use with bearing nuts, these lock washers have a conical shape that presses like a spring against bearings, bushings, gears, and pulleys to hold them in place on your threaded shaft or spindle.

Nuts

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.

Rectangular Push Nuts for Tapping Screws

Hex Speed Nuts

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

Metric Round Push Nuts

These metric push nuts can be used as a standalone 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.

Thrust Bearings

Corrosion-Resistant Thrust Bearings

The addition of iron and aluminum gives these aluminum-bronze bearings high strength and excellent corrosion resistance—making them suitable for use in marine and mining applications.

Multipurpose Thrust Bearings

These bronze bearings are strong, wear resistant, and excellent at handling shock loads.

Disc Springs

Curved Disc Springs

Use these high-carbon steel springs in noncorrosive environments.

Stacked Wave Disc Springs

Multiple rows of waves allow these springs to handle higher loads than standard wave disc springs.

Wave Disc Springs

Use these high-carbon steel springs in noncorrosive environments.

Notched Disc Springs

Notches make these springs more flexible than Belleville disc springs and allow liquid to flow around the spring, even while it's in use.

Flat Disc Springs

These flat rubber springs handle heavy loads, similar to Belleville disc springs, and resist oxidation, oil, and abrasion.

Corrosion-Resistant Stacked Wave Disc Springs

Made of 17-7 PH stainless steel with multiple rows of waves, these springs are more corrosion resistant than steel springs and handle greater loads than standard wave disc springs.

Extreme-Temperature Belleville Disc Springs

These springs withstand temperatures from -400° to 1100° F. All are 718 nickel, a high-strength, corrosion-resistant alloy that's also known as Inconel.

Corrosion-Resistant Curved Disc Springs

Made of stainless steel, these springs are more corrosion resistant than steel springs.

Belleville Disc Springs for Ball Bearings

Install these springs, also known as bearing preload washers, against ball bearings to reduce noise and unwanted movement along the shaft.

Corrosion-Resistant Wave Disc Springs

Made of stainless steel, these springs are more corrosion resistant than steel wave disc springs.

Corrosion-Resistant Belleville Disc Springs

Made of stainless steel, these springs are more corrosion resistant than steel springs. Use them on shafts, bolts, and the ends of valves to maintain tension and separate components.

Finger Disc Springs

Raised tabs, known as fingers, enable these springs to compress without widening, so they won't bind or deform in housings with little clearance. Use with ball bearings in precision and high-speed drive assemblies to reduce noise, vibration, and wear.

Split Wave Disc Springs

A gap allows these springs to compress without widening, so they won't bind or deform when used inside a housing with tight clearance.

Belleville Disc Springs for Flange Bolts

Keep pipe flange connections sealed during demanding applications. When installed under flange bolt heads, these springs compensate for shock loads, vibration, and thermal expansion and contraction.

Mil. Spec. Belleville Disc Springs

These springs meet MIL-W-12133.

Belleville Disc Springs

Use these steel springs in noncorrosive environments.

Dry-Running Thrust Bearings

High-Load Dry-Running Thrust Bearings

A metal backing adds strength.

Chemical-Resistant Dry-Running Thrust Bearings

These bearings stand up to a wider range of chemicals than other dry-running thrust bearings.

Ultra-Low-Friction Dry-Running Thrust Bearings

Use these bearings in applications with frequent starts and stops because they operate with very little friction.

High-Temperature Dry-Running Thrust Bearings

Graphite provides a layer of dry lubrication that operates in high-temperature environments.

Food Industry Dry-Running Thrust Bearings

Made of FDA listed materials for use in food applications, these bearings also withstand caustic and washdown environments.

Water-Resistant Dry-Running Thrust Bearings

Good for underwater applications, these bearings won’t swell or warp when wet.

Light Duty Dry-Running Thrust Bearings

Use where high loads and speeds are not required.

Oil-Embedded Thrust Bearings

Ultra-Low-Friction Oil-Embedded Thrust Bearings

For applications with frequent starts and stops, the oil in these bearings contains particles of slippery PTFE that lubricate the bearing during startup.

High-Load Food Industry
Oil-Embedded Thrust Bearings

Made of 863 iron-copper and embedded with NSF registered H1 oil, these bearings can tackle high-load applications in food plants, such as bottling and filling lines.

Oil-Embedded Thrust Bearings

Also known as Oilite® bearings.

Food Industry Oil-Embedded Thrust Bearings

The oil in these bearings is suitable for incidental contact with food.

High-Load Oil-Embedded Thrust Bearings

Increased iron content makes these bearings stronger and more resistant to shock loads than standard oil-embedded bearings; however they operate at lower speeds.

High-Load Ultra-Low-Friction
Oil-Embedded Thrust Bearings

Handle heavy loads that frequently start and stop along shafts—these bearings contain extra iron and slippery PTFE lubricant. They’re thrust bearings, which means they support loads parallel to the shaft.

Round Shims

Ring Shims

Ring Shim Sets

Wide-Rim Ring Shims

Tight-Fit Ring Shims

Color-Coded Ring Shims

Peel-Away Layered Ring Shims

Color-Coded Ring Shim Sets

Shims for Shortening Screw Shoulders

Shims for Lengthening Screw Shoulders

Shims for Ball Bearings

Shims for Ball Bearing Housings

Shims for D-Profile Shafts

Shim Sets for D-Profile Shafts

Shim Sets for Keyed Shafts

Shims for Keyed Shafts

Shims for Button Dies

External Retaining Rings

Push-On External Retaining Rings

Push-On Retaining Caps

Rectangular Push-On External Retaining Rings

Flanged Push-On External Retaining Rings

External Retaining Rings

Heavy Duty External Retaining Rings

Mil. Spec. External Retaining Rings

Self-Locking External Retaining Rings

Inverted External Retaining Rings

Bowed External Retaining Rings

Side-Mount External Retaining Rings

Low-Clearance Side-Mount External Retaining Rings

Wide-Grip Side-Mount External Retaining Rings

Bowed Side-Mount External Retaining Rings

Heavy Duty Side-Mount External Retaining Rings

Speared Ends External Retaining Rings

Low-Clearance External Retaining Rings

Crimp-On External Retaining Rings

Single-Turn Spiral External Retaining Rings

Spiral External Retaining Rings

Clip-On External Retaining Rings

Heavy Duty Spiral External Retaining Rings

Internal Retaining Rings

Push-On Internal Retaining Rings

Heavy-Duty Internal Retaining Rings

Internal Retaining Rings

Inverted Internal Retaining Rings

Bowed Internal Retaining Rings

Internal Teeth Retaining Rings

Heavy Duty Spiral Internal Retaining Rings

Single-Turn Spiral Internal Retaining Rings

Spiral Internal Retaining Rings

Push Ring Assortments

External Push Ring Assortments

Internal Push Ring Assortments

Retaining Ring Assortments

External, Internal, and Side-MountRetaining Ring Assortments

Side-Mount External Retaining Ring Assortments

External and Side-Mount Retaining Ring Assortments

External and Internal Spiral Retaining Ring Assortments

External Retaining Ring Assortments

External and Internal Retaining Ring Assortments

Internal Retaining Ring Assortments

Ring Shim Assortments

Shim Assortments for Shortening Shoulder Screws

Ring Shim Assortments

Shim Assortments for Lengthening Shoulder Screws

Shim Assortments for Button Dies

Unthreaded Spacers for Keyed Shafts

Unthreaded Spacers for Keyed Shafts

Spring Lock Washers for Slotted Bearing Nuts

Spring Lock Washers for Slotted Bearing Nuts

Nuts

Round Push Nuts

Rectangular Push Nuts for Tapping Screws

Hex Speed Nuts

Metric Round Push Nuts

Flanged Push Nuts

Rectangular Push Nuts

Thrust Bearings

Corrosion-Resistant Thrust Bearings

Multipurpose Thrust Bearings

External, Internal, and Side-Mount
Retaining Ring Assortments

High-Load Food Industry
Oil-Embedded Thrust Bearings

High-Load Ultra-Low-Friction
Oil-Embedded Thrust Bearings