Washer Shims | McMaster-Carr

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

REACH Compliant

	For Groove Diameter For Groove Diameter

	Magnetic Properties Magnetic Properties

May Be Mildly Magnetic

Magnetic

Nonmagnetic

	For ID For ID

	Minimum Hardness Minimum Hardness

	Ring Thickness Ring Thickness

	Specifications Met Specifications Met

	Individual/Set Individual/Set

Individual

Set

	Finish Finish

Chromate Conversion
Coated

Galvanized

Hot-Dipped Galvanized

Zinc Yellow-Chromate
Plated

Zinc-Chromate Plated

	Ring OD Ring OD

10,770 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.

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.

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.

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.

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.

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.

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.

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.

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 Button Dies

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

Disc Shims

Use these round shims as they are, or punch out the middle to create the ID you need.

Slotted Shims

Large-Adjustment Slotted Shims

Use these thick shims to align cabinets, doors, and windows, or for other rough leveling.

Slotted Shims

The slot lets you insert, remove, and adjust the shims without disassembling your machinery.

Slotted Shim Sets

Be prepared with slotted shims in a variety of thicknesses. The slot lets you insert, remove, and adjust the shims without disassembling your machinery.

Color-Coded Slotted Shim Sets

Keep slotted shims in a variety of thicknesses on hand with these sets, which are color-coded by thickness for easy identification. The slot lets you insert, remove, and adjust the shims without disassembling your machinery.

Color-Coded Slotted Shims

These shims are color-coded by thickness for easy identification. The slot lets you insert, remove, and adjust the shims without disassembling your machinery.

Breakaway Slotted Shims

These shims are scored so you can easily shorten them to the length you need. Designed to fit around screws, they are commonly used in window, door, and cabinet installations.

Color-Coded Horseshoe Shims

These shims are color-coded by thickness for easy identification. The horseshoe design fits around screws.

Horseshoe Shims

Align cabinets, doors, and windows with these shims. The horseshoe design fits around screws.

Interlocking Color-Coded Horseshoe Shims

Clips on these shims hold them together when stacked, and they are color coded by thickness for easy identification. Designed to fit around screws, they are commonly used in window, door, and cabinet installations.

Shims for Hinges

Slide these shims behind your door’s hinge to align it in the jamb.

Multi-Slotted Shims

Use a single shim on feet or positioning arms that are secured with multiple fasteners. The slots let you insert, remove, and adjust the shims without disassembling your machinery. Also known as finger shims.

Slotted Tapered Shims

The slot lets you install these rigid shims around screws.

Unthreaded Spacers

18-8 Stainless Steel Unthreaded Spacers

18-8 stainless steel spacers have good corrosion resistance.

Zinc-Plated Brass Unthreaded Spacers

Brass makes these spacers electrically conductive and the zinc-plated finish adds corrosion resistance.

Aluminum Unthreaded Spacers

Made of aluminum, these spacers are lightweight and mildly corrosion resistant.

Zinc-Plated Steel Unthreaded Spacers

The zinc plating provides some corrosion resistance.

316 Stainless Steel Unthreaded Spacers

These spacers have excellent corrosion resistance and are passivated for enhanced protection.

Titanium Unthreaded Spacers

Choose titanium spacers for their high strength-to-weight ratio and excellent corrosion resistance.

Black-Anodized Aluminum Unthreaded Spacers

The anodized coating on these lightweight spacers provides increased abrasion resistance over uncoated aluminum.

Nylon Unthreaded Spacers

These spacers have excellent wear and abrasion resistance. Exposure to moisture may cause them to expand.

Polyethylene Unthreaded Spacers

Almost nonabsorbent, these unthreaded LDPE and HDPE spacers won't swell when exposed to water.

Acetal Unthreaded Spacers

Naturally slippery and wear resistant, acetal spacers also offer some resistance to moisture.

PTFE Unthreaded Spacers

PTFE spacers have a slippery surface and surpass most plastic spacers when it comes to chemical resistance and performance in extreme temperatures.

Polypropylene Unthreaded Spacers

Polypropylene spacers have a hard surface and resist many chemicals and solvents.

Polycarbonate Unthreaded Spacers

Made of FDA-listed material, these clear spacers can be used in food and beverage applications.

PEEK Unthreaded Spacers

Use PEEK spacers as an alternative to metal spacers in high-temperature, high-stress applications. They resist chemicals, wear, and moisture.

Polished Unthreaded Spacers

With their mirror-like finish, these are the go-to spacers when appearance matters.

Made-to-Order Unthreaded Spacers

Choose the OD, ID, length, and material and we will accommodate your unique spacer needs.

Electrical-Insulating Unthreaded Spacers

Protect components from electrical charges.

Vibration-Damping Unthreaded Spacers

Reduce vibration, shock, and noise with these spacers that compress between components.

Unthreaded Spacer Stock

Cut stock to the length you need.

Unthreaded Spacers for Angles

The 45° end fits against an angled surface to create a flat surface for connection.

Unthreaded Spacers for Tubes

Also known as saddle washers, the curved end fits against round objects such as tube and pipe.

Slotted Unthreaded Spacers

An economical alternative to standard unthreaded spacers.

Unthreaded Spacers for Keyed Shafts

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

Press-Fit Unthreaded Spacers

Also known as captive spacers, the splines on these bite into a panel for a permanent hold.

Internal Retaining Rings

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.

Internal Retaining Rings

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

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.

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.

Push-On Internal Retaining Rings

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

External Retaining 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.

Spiral External Retaining Rings

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

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.

Bowed External Retaining Rings

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

Heavy Duty Spiral External Retaining Rings

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

Inverted External Retaining Rings

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

Single-Turn Spiral External Retaining Rings

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

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.

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.

Side-Mount External Retaining Rings

Also known as 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.

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.

Push-On External Retaining Rings

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

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.

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.

Clip-On External Retaining Rings

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

Washers

Leveling Washers for I-Beams

Metric Leveling Washers for I-Beams

Easy-Install Slotted Washers

A slot in the side allows you to install and remove these washers without completely disassembling your joint.

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.

Retaining Ring Assortments

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.

External and Internal Spiral Retaining Ring Assortments

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

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 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 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.

Push Ring Assortments

Internal Push Ring Assortments

External Push Ring Assortments

Unthreaded Inserts

Brass Unthreaded Inserts for Plastic

Made from brass, these inserts are nonmagnetic, mildly corrosion resistant, and electrically conductive.

Steel Unthreaded Inserts for Plastic

A zinc-plated finish gives these steel inserts mild corrosion resistance.

Aluminum Unthreaded Inserts for Plastic

These aluminum inserts are lightweight, nonmagnetic, and mildly corrosion resistant.

Unthreaded Inserts for Metal

Protect bolts from sideways (shear) pressure.