Steel Shims | McMaster-Carr

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

REACH Compliant

	Specifications Met Specifications Met

ASME

	Temper Rating Temper Rating

Full Hard

Softened (Annealed)

	Slot Width Slot Width

	Hardness Hardness

	Number of Pieces Number of Pieces

6
8
9
12
19
59
150
270

300
350
386
450
590
755
825
850

1,335
1,350
1,500
1,520
3,342
7,060

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8,773 Products

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.

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.

Disc Shims

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

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.

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.

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.

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.

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.

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.

Mil. Spec. Washers

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

General Purpose Washers

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.

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 with Material Certification

These washers come with a traceable lot number and a physical and chemical test report.

Tension-Indicating Washers for Structural Applications

When you’ve applied the correct tension, these washers release an orange dye as a visual indicator.

Washers for Structural Applications

Designed for use with A325 structural screws, studs, and nuts, these washers are often used for construction and exterior building applications.

Metric Washers for Structural Applications

These thick washers are designed to support structural screws, studs, and nuts.

Washers for Blind Rivets

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

Square Washers

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

Square Washers for Blind Rivets

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

Easy-Install Slotted Washers

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

Steel Washers for Rigid Insulation

Steel washers provide a stronger bearing surface than plastic washers

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

Double-Clipped Washers

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

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.

Angled-Edge Washers for Tie-Down Straps

Use the angled edges to hold and align tie-down straps.

Sleeve Washers for Soft Material

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

Washers for Plaster

Repair sagging, cracked plaster with these washers. The holes allow plaster to flow through to form a secure bond between the washer and the wall.

Washers for Foam Insulation

These washers have prongs that pierce foam insulation so they stay in place.

Curved Washers

Also known as saddle washers, these curved washers fit round surfaces such as tubes and pipe.

Cup Washers for Oversized Holes

Cover oversized holes and the ends of tubes and pipe with these cup-shaped washers.

Spring Lock Washers

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.

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.

Split Lock Washers

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

Tooth Lock Washers

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 Tight-Grip External-Tooth Lock Washers

To keep 90° countersunk screws from loosening in vibration applications, the teeth on these washers bite further into the screw head and joint than standard external-tooth lock washers for a more secure hold.

Countersunk External-Tooth Lock Washers

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

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.

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.

Internal-Tooth Lock Washers for Soft Material

Slightly domed with an oversized outside diameter, these washers distribute your fastener's load over a larger surface area than other internal-tooth lock washers to limit damage to soft material.

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.

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.

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.

Square-Neck Bolt Lock Washers

Designed for use with square-neck bolts such as carriage bolts, these washers have teeth that dig into wood and other soft material to prevent rotation.

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

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.

Metric High-Pressure-Rated
Metal-Bonded Sealing Washers

Able to withstand pressure greater than 7,000 psi, these one-piece bonded washers create the tightest seals.

Pressure-Rated Metal-Bonded Sealing
Washers for Nuts and Washers

Also known as thread-sealing washers, use these under nuts and other washers.

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.

Spacers and Standoffs

Zinc-Plated Steel Unthreaded Spacers

The zinc plating provides some corrosion resistance.

Made-to-Order Unthreaded Spacers

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

Polished Unthreaded Spacers

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

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.

Female Threaded Round Standoffs

Male-Female Threaded Hex Standoffs

Shim Assortments

Shim Stock Assortments

Create a custom shim to fit your application.

Shim Assortments for Shortening Shoulder Screws

Slide onto a shoulder screw to shorten the length of 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.

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.

Washer Assortments

Oversized Washer Assortments

These washers have exaggerated diameters and/or thicknesses for covering oversized holes or for use as spacers and levelers.

Washer Assortments

USS Washer Assortments

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

SAE Washer Assortments

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

Tooth Lock Washer Assortments

Teeth bite into the joint for a tighter grip than split lock 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

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.

Left-Hand to Right-Hand Male 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.

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.

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.

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.

Unthreaded Inserts

Steel Unthreaded Inserts for Plastic

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

Unthreaded Inserts for Metal

Protect bolts from sideways (shear) pressure.

Hollow Female Threaded Rods

Connect and separate threaded rods, studs, and other components. These hollow rods have internal threads on both ends, so you can make connections and still pass wiring and other objects through the center of the rod.

Drill Bushings

Press-Fit Drill Bushings

Made-to-Order Press-Fit Drill Bushings

Choose the ID, OD, and length you need.

Finish-Your-Own Press-Fit Drill Bushings

Larger OD tolerances than standard press-fit bushings allow for finishing. Bushings should be machine ground.

Metric Press-Fit Drill Bushings

Also known as jig bushings, these metric drill bushings fit inside fixture plate holes to guide drill bits, counterbores, reamers, and other cutting tools. They improve accuracy so that your drilled holes and cuts are consistent from part to part.

Made-to-Order Metric Press-Fit Drill Bushings

Choose the ID, OD, and length you need.

Metric Press-Fit Drill Bushings with Head

Even under extreme drilling pressure, these metric bushings won't press through your jig plate. A flanged head on the top of the bushing acts as a stop, preventing it from moving as you push down your drill bit, reamer, or other cutting bit.

Press-Fit Drill Bushings with Head

The head prevents these bushings from being pushed through the jig when drilling pressure is extreme. The head sits above the jig plate or can be mounted flush by installing in a counterbored hole.

Made-to-Order Press-Fit Drill Bushings with Head

Choose the ID, OD, and length you need.

Made-to-Order Removable Drill Bushings

Choose the ID, OD, and length you need.

Removable Drill Bushings

Replace worn bushings and quickly change IDs without needing to repeatedly use a lever press. Instead of pressing bushings in and out of your jig fixture, which can cause damage, these bushings slide in and out of sleeves.

Secure-Hold Drill Bushings for Plastic

The knurls resist force and provide better holding strength than serrations. Encase in plastic tooling.

Drill Bushings for Plastic

The serrations grip to prevent rotation and spin out. Press or encase into plastic tooling.

Removable Drill Bushings for Thin Metal

Insert these bushings into a drilled hole and twist the lock ring to secure. Reusable and easy to replace, they are held in in place by a separate locking part.

Drill Bushings for Soft Metal and Wood

The serrations at the top of the bushing grip to prevent rotation and spin out.

Washer-Style Tag Holders

Bolt these holders to a surface and then attach a tag to the small hole.

Shims for Keyway Broaches

When broaching in multiple passes, shims are necessary to ensure full keyway depth.

Shims

Ring Shims

Ring Shim Sets

Tight-Fit Ring Shims

Wide-Rim Ring Shims

Shims for Shortening Screw Shoulders

Shims for Lengthening Screw Shoulders

Disc Shims

Shims for Keyed Shafts

Shim Sets for Keyed Shafts

Shims for Button Dies

Shims for D-Profile Shafts

Shim Sets for D-Profile Shafts

Multi-Slotted Shims

Shim Stock

Shim Stock Sets

Peel-Away Layered Shim Stock

Made-to-Order Shims

Made-to-Order Peel-Away Layered Shims

Washers

Oversized Washers

Metric Oversized Washers

Mil. Spec. Washers

General Purpose Washers

Metric General Purpose Washers

SAE Washers

ASME Washers for Soft Material

USS Washers

Washers with Material Certification

Tension-Indicating Washers for Structural Applications

Washers for Structural Applications

Metric Washers for Structural Applications

Washers for Blind Rivets

Square Washers

Square Washers for Blind Rivets

Easy-Install Slotted Washers

Steel Washers for Rigid Insulation

Countersunk Washers

Metric Countersunk Washers

Finishing Countersunk Washers

Metric Finishing Countersunk Washers

Double-Clipped Washers

Clipped Washers

Oversized Clipped Washers

Angled-Edge Washers forToggle Clamp Holding Screws

Angled-Edge Washers for Tie-Down Straps

Sleeve Washers for Soft Material

Washers for Plaster

Washers for Foam Insulation

Curved Washers

Cup Washers for Oversized Holes

Spring Lock Washers

Spring Lock Washers for Slotted Bearing Nuts

Belleville Spring Lock Washers

Belleville Spring Lock Washers for Socket Head Screws

Metric Spring Lock Washers

Split 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

Tooth Lock Washers

Tight-Grip External-Tooth Lock Washers

Countersunk Tight-Grip External-Tooth Lock Washers

Countersunk External-Tooth Lock Washers

External-Tooth Lock Washers

Metric External-Tooth Lock Washers

Mil. Spec. External-Tooth Lock Washers

Internal-Tooth Lock Washers

Metric Internal-Tooth Lock Washers

Mil. Spec. Internal-Tooth Lock Washers

Internal-Tooth Lock Washers for Soft Material

Internal-/External-Tooth Lock Washers

Tab Lock Washers

Tab Lock Washers

Metric Tab Lock Washers

Wedge Lock Washers

Wedge Lock Washers

Angled-Edge Washers for
Toggle Clamp Holding Screws

Metric High-Pressure-Rated
Metal-Bonded Sealing Washers

Pressure-Rated Metal-Bonded Sealing
Washers for Nuts and Washers