Black Oxide Spacers | McMaster-Carr

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1,851 Products

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.

USS Washers

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

Finishing Countersunk Washers

Metric Finishing Countersunk Washers

Square Washers

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

Sleeve Washers for Soft Material

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

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.

Easy-Install Slotted Washers

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

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.

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.

Split Lock Washers for Socket 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.

External-Tooth Lock Washers

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

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

Also known as NORD-LOCK® 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.

Leveling and Wave Washers

Triple-Wave Washers

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

Single-Wave Washers

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

Leveling Washers for I-Beams

Leveling Washers

Thread Adapters

Inch-to-Inch Male-Female Hex Thread Adapters

Join threads with small diameters to large or course threads to fine with these inch-sized adapters.

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.

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.

Left-Hand to Right-Hand Male Thread Adapters

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.

Shaft Collars

Clamping Shaft Collars

These metal collars are stronger than plastic shaft collars.

Machinable-Bore Clamping Shaft Collars

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

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.

Precision Adjustable-Width Clamping Shaft Collars

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

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.

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.

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.

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.

Set Screw Shaft Collars

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

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.

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-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.

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.

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.

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.

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.

Square Shaft Collars

Install these two-piece collars square shafts.

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 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.

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.

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.