Stainless Steel Spacers | McMaster-Carr

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REACH Compliant

	Threading Threading

	Fully Threaded
	Partially Threaded

	Thread Length Thread Length

	Washer Type Washer Type

	Thread Fit Thread Fit

	Bearing Material Bearing Material

440C Stainless Steel

304 Stainless Steel

316 Stainless Steel

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10,326 Products

Unthreaded Spacers

18-8 Stainless Steel Unthreaded Spacers

18-8 stainless steel spacers have good corrosion resistance.

316 Stainless Steel Unthreaded Spacers

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

Made-to-Order Unthreaded Spacers

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

Unthreaded Spacers for Angles

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

Threaded Standoffs

Male-Female Threaded Hex Standoffs

NAS Male-Female Threaded Hex Standoffs

These standoffs are made to NAS specifications.

Female Threaded Hex Standoffs

NAS Female Threaded Hex Standoffs

Choose these standoffs for their adherence to NAS 1831 specifications.

Female Threaded Round Standoffs

Male Threaded Standoffs

Male-Female Pillar Posts

Female Pillar Posts

Sanitary Threaded Standoffs

Mount components onto food processing lines, walls, and sanitary equipment while leaving space to clean in between.

Press-Fit Threaded Standoffs

Press-Fit Threaded Standoffs with Open End

Press-Fit Threaded Standoffs with Closed End

Miniature Press-Fit Threaded Standoffs with Open End

These standoffs are designed to fit in the limited space of compact electronics such as laptops and hand-held devices.

Splined Press-Fit Threaded Standoffs with Open End

Press-Fit Unthreaded Spacers

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

Press-Fit Supports

Press-Fit Snap-Top Supports

With the end clinched in place, the prongs allow you to quickly snap a panel on and off these supports.

Press-Fit Keyhole Supports

Once the end is clinched in place, panels with keyholes easily slide on and off these supports.

Washers

Oversized Washers

Compared to our general purpose washers, these have exaggerated diameters and/or thicknesses for covering oversized holes or for use as spacers and levelers.

Metric Oversized Washers

Compared to our general purpose washers, these have exaggerated diameters and/or thicknesses. Use them to cover oversized holes, hold heavy fastening loads, or as spacers and levelers.

Metric General Purpose Washers

Use these metric washers to evenly distribute the load under bolt or screw heads and nuts when fastening. They can also act as spacers.

General Purpose Washers

Mil. Spec. Washers

Choose these washers for their adherence to strict military standards for material and construction.

SAE Washers

SAE washers generally have a smaller ID and OD than USS washers.

ASME Washers for Soft Material

Also known as Type B washers, these distribute your fastener's load over a larger surface area than other washers to minimize damage to soft materials.

USS Washers

USS washers generally have a larger ID and OD than SAE washers.

Washers for Blind Rivets

Also known as backup washers, these are for use with blind rivets for extra support when fastening into soft material.

Countersunk Washers

Flat and oval head screws sit flush within these washers for a neat, finished appearance.

Metric Countersunk Washers

Flat and oval head screws sit flush within these metric washers for a neat, finished appearance.

Finishing Countersunk Washers

Metric Finishing Countersunk Washers

Sleeve Washers for Soft Material

Reinforce holes in soft material to keep them from collapsing around screws.

Square Washers

Square washers fit into slots and channels and have flat sides to keep them from rotating.

Easy-Install Slotted Washers

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

Clipped Washers

Clipped to fit where standard washers can't, these won't rotate when you position the flat edge against a flat surface.

Oversized Clipped Washers

With greater diameters and/or thicknesses than general purpose washers, these washers cover oversized holes or act as spacers and levelers. Clipped to fit where standard washers can’t, they won’t rotate when you position the flat edge against a flat surface.

Angled-Edge Washers for
Toggle Clamp Holding Screws

Use on clamps with open arms to keep the holding screw in place.

Lock Washers

Belleville Spring Lock Washers

Also known as conical washers, these have a slightly cupped shape that gives them spring-like flexibility to grip tighter than split and tooth lock washers.

Belleville Spring Lock Washers for Socket Head Screws

These washers have smaller outside diameters than standard spring lock washers to fit neatly under socket head cap screws.

Metric Spring Lock Washers

The arched shape of these washers presses up against a bolt and down against a nut to prevent loosening from wear, vibration, or temperature changes.

Metric Split Lock Washers

Split Lock Washers

As a screw is tightened, these washers flatten to add tension to the joint and prevent loosening from small amounts of vibration.

Mil. Spec. Split Lock Washers

Choose these washers for their adherence to strict military standards for material and construction.

Oversized Split Lock Washers

Compared to standard split lock washers, these are thicker and have larger outside diameters.

Split Lock Washers for Socket Head Screws

Metric Split Lock Washers for Socket Head Screws

Internal-Tooth Lock Washers

Internal teeth dig into the screw head while the smooth outside edge won't snag objects. Use with fasteners that have small heads, such as fillister and cheese head screws.

Metric Internal-Tooth Lock Washers

Internal teeth dig into the screw head while the smooth outside edge won't snag objects. Use with metric fasteners that have small heads, such as fillister and cheese head screws.

Mil. Spec. Internal-Tooth Lock Washers

Choose these washers for their adherence to strict military standards for material and construction.

External-Tooth Lock Washers

Teeth on the outside edge of the washer bite into the screw head and joint for a tight grip.

Metric External-Tooth Lock Washers

Teeth on the outside edge of these metric washers bite into the screw head and joint for a tight grip.

Mil. Spec. External-Tooth Lock Washers

Choose these washers for their adherence to strict military standards for material and construction.

Tight-Grip External-Tooth Lock Washers

The teeth on these washers bite further into the screw head and joint than standard external-tooth washers to provide a stronger hold.

Countersunk External-Tooth Lock Washers

The teeth on these washers firmly grip heads of 82° flat head countersunk screws.

Internal-/External-Tooth Lock Washers

The combination of internal and external teeth boosts gripping power to maintain a tight hold and provide more vibration resistance than other tooth lock washers. Use with fasteners that have heads large enough to make contact with the external teeth, such as pan, button, and binding head screws.

Wedge Lock Washers

Comparable to NORD-LOCK® and Sherex TEC Series washers, these two-piece washers provide more locking power than split, tooth, and spring lock washers. Wedges on the inside lock the two pieces together, and serrations on the exterior grip surfaces to resist loosening from high vibration and shifting.

Tab Lock Washers

Bend one tab against the side of the mounting surface and the other tab against the flats on a bolt or nut to prevent both the fastener and washer from turning and loosening in high-vibration applications, such as a motor mount.

Metric Tab Lock Washers

Bend the tab of these metric lock washers against the flats of a hex nut or bolt head to prevent the fastener and washer from turning and loosening due to vibration, wear, or changes in temperature.

Metal-Bonded Sealing Washers

High-Pressure-Rated Metal-Bonded Sealing Washers

Able to withstand pressure greater than 3,000 psi, these one-piece bonded washers create the tightest seals.

Pressure-Rated Metal-Bonded Sealing Washers

These washers are rated to withstand pressure up to 100 psi.

Metal-Bonded Sealing Washers

Create a stronger seal than metal or rubber alone. These one-piece washers are metal for strength with a bonded rubber seal that creates a tight grip.

Leveling and Wave Washers

Triple-Wave Washers

With three points of surface contact, these washers provide more stability than single-wave washers.

Metric Single-Wave Washers

These curved, flexible washers act like springs to compensate for tolerance variations and uneven surfaces.

Single-Wave Washers

These curved, flexible washers act like springs to compensate for tolerance variations and uneven surfaces.

Leveling Washers for I-Beams

Metric Leveling Washers for I-Beams

Leveling Washers

Metric Leveling Washers

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.

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 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.

Disc Shims

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

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.

Horseshoe Shims

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

Shim Stock

Cut this stock into custom shapes to fit your application.

Shim Stock Sets

Keep shim stock in a variety of thicknesses on hand with these sets. Cut into custom shapes to fit your application.

Adhesive-Back Shim Stock

A durable acrylic adhesive keeps this shim stock from sliding out of place. Cut it into custom shapes to fit your application.

Shim Tape

Level dies, plates, presses, and other machine tools—this shim tape conforms to curves and uneven surfaces.

Peel-Away Layered Shim Stock

Cut this shim stock into custom shapes to fit your application. Stock is made of layers of material bonded with adhesive; remove layers with a utility knife until you get the thickness you need.

Made-to-Order Shims

Send us a drawing, and we'll cut your custom shim.

Made-to-Order Peel-Away Layered Shims

Send us a drawing, and we'll cut your custom shim. Shims are made of layers of metal bonded with adhesive; remove layers with a utility knife until you get the thickness you need.

Male-Female Thread Adapters

Inch-to-Inch Male-Female Hex Thread Adapters

Change thread sizes or types, such as fine to coarse threads, on parts without changing gender.

Metric-to-Metric Male-Female Hex Thread Adapters

In addition to joining male- and female-threaded parts, these adapters can increase or decrease metric thread sizes and change the thread pitch.

Inch-to-Metric Male-Female Hex Thread Adapters

Change inch threads to metric with these adapters, or swap metric threads for inch. An external hex lets you tighten or loosen them with a wrench.

Male-Female Round Universal
Thread Adapters with Through Hole

Connect male- and female-threaded parts of different thread types and sizes, while allowing air, liquids, wire, or other thin materials to pass through.

Slotted-Drive Male-Female Round Thread Adapters

Inch-to-NPT Male-Female Hex
Thread Adapters with Through Hole

The through hole allows you to connect float rods to float valves.

Male Thread Adapters

Inch-to-Inch Male Hex Thread Adapters

Need to join two female-threaded parts, such as coupling nuts, with dissimilar inch thread sizes? Attach them to these adapters and tighten the exterior hex nut for a secure connection.

Metric-to-Metric Male Hex Thread Adapters

Twist these adapters onto female metric threads to change pitch or switch thread sizes.

Inch-to-Metric Male Hex Thread Adapters

One side inch, one side metric, and a hex in the middle—these handy fasteners connect two female-threaded parts, such as coupling nuts, adapting from inch threads to metric. Tighten with a standard wrench.

Male Round Universal Thread
Adapters with Through Hole

Join two female-threaded parts of various thread types and sizes, while allowing air, liquids, wire, or other thin materials to pass through.

Female Thread Adapters

Inch-to-Inch Female Hex Thread Adapters

Connect two differently sized male-threaded parts, such as threaded rods, and tighten with a standard wrench.

Metric-to-Metric Female Hex Thread Adapters

Increase or decrease metric thread size from one male-threaded part to another. Commonly used to connect two differently sized threaded rods, they have a hex-shaped body, so you can tighten them with a standard wrench.

Inch-to-Metric Female Hex Thread Adapters

Adapt threaded rods from inch to metric. These adapters connect two male-threaded fasteners, so you can change the gender of a mating part or increase or decrease its thread size. The hex-shaped body fits into the head of a standard wrench.

Left-Hand to Right-Hand Female Hex Thread Adapters

Often called sleeve nuts, these thread adapters fasten parts with right-hand threads to parts with left-hand threads.

Fastener Assortments

Shim Stock Assortments

Create a custom shim to fit your application.

Washer Assortments

SAE Washer Assortments

SAE washers generally have a smaller ID and OD than USS washers.

Split Lock Washer Assortments

As a screw is tightened, these washers flatten to add tension to the joint and prevent loosening from small amounts of vibration.

Fastener Maintenance Assortments

Sleeve Bearings

High-Load Dry-Running Sleeve Bearings

A metal shell adds strength.

Vibration-Damping Oil-Embedded Sleeve Bearings

With a flexible layer of rubber sandwiched between an oil-embedded bronze bearing and rigid metal shell, these bearings reduce wear and machinery noise.

Clamping and Workholding

Corrosion-Resistant Press-Fit Drill Bushings

These bushings are made of stainless steel, which provides excellent corrosion resistance.

Press-Fit Locating and Support Buttons

Support and position workpieces and fixtures from the bottom or side. These buttons press into a drilled hole for permanent installation.

Screw-Mount Locating and Support Buttons

Mount through the counterbored hole with a socket head cap screw to support and position workpieces and fixtures from the bottom or side.

Door Stops for Sliding Doors

Keep sliding doors and panels from damaging walls and door frames.

Shaft Collars

Set Screw Shaft Collars

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

Clamping Shaft Collars

These metal collars are stronger than plastic shaft collars.

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.

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.

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.

Clamping Two-Piece Shaft Collars

These metal collars are stronger than plastic shaft collars.

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.

Clamping Two-Piece Shaft Collars with Wrench Flats

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

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.

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.

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.

Face-Mount Shaft Collars

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

Bearing Retaining Locknuts

With a nylon insert that grips your threaded shaft or spindle without damaging its threads, these locknuts—also called shaft nuts—hold bearings, bushings, gears, and pulleys prone to vibration tightly in place.

Support-Rail Shaft Collars

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

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.

Hex 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.

D-Profile Shaft Collars

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

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.

Linear Bearings

Linear Sleeve Bearings

Because they usually do not require lubrication, linear sleeve bearings outperform linear ball bearings in dirty environments.

Food Industry Linear Sleeve Bearings

Made of FDA-listed materials for use in food applications, these bearings also have excellent chemical and corrosion resistance.

Linear Ball Bearings

Use ball bearings in debris-free environments and when speed is a necessity. They operate with less friction than sleeve bearings, so you can run them at higher speeds.

High-Temperature Linear Ball Bearings

The choice for low-friction motion in high-temperature environments.

Linear Ball Bearings for Support Rail Shafts

Ball bearings create less friction than sleeve bearings, so they require less force to operate.

Food Industry Linear Sleeve
Bearings for Support Rail Shafts

Made of FDA-listed materials for use in food applications, these bearings also have excellent chemical and corrosion resistance.

Clamping Acme Lead Screw Collars

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

Fastener Kits for Enclosures

Mount components to your enclosure without worrying about leaks—these kits seal out water from washdowns, rain, and snow when used with enclosures rated NEMA 4X.

Bushings for Chain and Belt Drives

Quick-Grip Screw-Clamp Bushings

Also known as Trantorque bushings, these tighten with a twist of the collar nut—no screws needed.

Quick-Disconnect (QD) Bushings

The screw connections on these bushings easily mate to compatible quick-disconnect sprockets and pulleys.

Split-Tapered Bushings

The tapered barrel on these bushings is split on both sides, allowing them to contract more tightly around the shaft than quick-disconnect and taper-lock bushings.

Hex Flanged Eccentric Bushings

Often used with V-groove wheels or track roller carriages, these off-center bushings create precise mounting clearance.

Thread Adapters for Drum Openings

Convert drum openings with metric or BSPP threads to a 2 NPT pipe size.

Unthreaded Spacers

18-8 Stainless Steel Unthreaded Spacers

316 Stainless Steel Unthreaded Spacers

Made-to-Order Unthreaded Spacers

Unthreaded Spacers for Angles

Threaded Standoffs

Male-Female Threaded Hex Standoffs

NAS Male-Female Threaded Hex Standoffs

Female Threaded Hex Standoffs

NAS Female Threaded Hex Standoffs

Female Threaded Round Standoffs

Male Threaded Standoffs

Male-Female Pillar Posts

Female Pillar Posts

Sanitary Threaded Standoffs

Press-Fit Threaded Standoffs

Press-Fit Threaded Standoffs with Open End

Press-Fit Threaded Standoffs with Closed End

Miniature Press-Fit Threaded Standoffs with Open End

Splined Press-Fit Threaded Standoffs with Open End

Press-Fit Unthreaded Spacers

Press-Fit Unthreaded Spacers

Press-Fit Supports

Press-Fit Snap-Top Supports

Press-Fit Keyhole Supports

Washers

Oversized Washers

Metric Oversized Washers

Metric General Purpose Washers

General Purpose Washers

Mil. Spec. Washers

SAE Washers

ASME Washers for Soft Material

USS Washers

Washers for Blind Rivets

Countersunk Washers

Metric Countersunk Washers

Finishing Countersunk Washers

Metric Finishing Countersunk Washers

Sleeve Washers for Soft Material

Square Washers

Easy-Install Slotted Washers

Clipped Washers

Oversized Clipped Washers

Angled-Edge Washers forToggle Clamp Holding Screws

Lock Washers

Belleville Spring Lock Washers

Belleville Spring Lock Washers for Socket Head Screws

Metric Spring Lock Washers

Metric Split Lock Washers

Split Lock Washers

Mil. Spec. Split Lock Washers

Oversized Split Lock Washers

Split Lock Washers for Socket Head Screws

Metric Split Lock Washers for Socket Head Screws

Internal-Tooth Lock Washers

Metric Internal-Tooth Lock Washers

Mil. Spec. Internal-Tooth Lock Washers

External-Tooth Lock Washers

Metric External-Tooth Lock Washers

Mil. Spec. External-Tooth Lock Washers

Tight-Grip External-Tooth Lock Washers

Countersunk External-Tooth Lock Washers

Internal-/External-Tooth Lock Washers

Wedge Lock Washers

Tab Lock Washers

Metric Tab Lock Washers

Metal-Bonded Sealing Washers

High-Pressure-Rated Metal-Bonded Sealing Washers

Pressure-Rated Metal-Bonded Sealing Washers

Metal-Bonded Sealing Washers

Leveling and Wave Washers

Triple-Wave Washers

Metric Single-Wave Washers

Single-Wave Washers

Leveling Washers for I-Beams

Metric Leveling Washers for I-Beams

Leveling Washers

Metric Leveling Washers

Shims

Angled-Edge Washers for
Toggle Clamp Holding Screws

Male-Female Round Universal
Thread Adapters with Through Hole

Inch-to-NPT Male-Female Hex
Thread Adapters with Through Hole

Male Round Universal Thread
Adapters with Through Hole