Phenolic Flat Washers | McMaster-Carr

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7,875 Products

Metal Washers

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.

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.

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.

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.

Washers with Material Certification

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

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.

Plastic Washers

Metric Plastic Washers

Mil. Spec. Plastic Washers

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

Chemical-Resistant Plastic Washers

These washers surpass most other plastic washers when it comes to withstanding chemicals, oil, and grease.

Metric Chemical-Resistant Plastic Washers

These metric washers surpass most other plastic washers when it comes to withstanding chemicals, oil, and grease.

Mil. Spec. Chemical-Resistant Plastic Washers

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

Electrical-Insulating Plastic Washers

Metric Electrical-Insulating Plastic Washers

Water- and Steam-Resistant Plastic Washers

Low moisture absorption and good heat resistance make these washers suitable for wet and harsh environments.

Metric Water- and Steam-Resistant Plastic Washers

Low moisture absorption and good heat resistance make these metric washers suitable for wet and harsh environments.

High-Temperature Plastic Washers

These washers can withstand temperatures up to 450° or 500° F without degrading.

Metric High-Temperature Plastic Washers

These metric washers can withstand temperatures up to 450° or 500° F without degrading.

Ceramic and Mica Washers

Extreme-Temperature Ceramic Washers

These washers hold up in blistering temperatures up to 3000° F.

Metric Extreme-Temperature Ceramic Washers

These metric washers hold up in blistering temperatures up to 3000° F.

High-Temperature Mica Washers

Mica washers withstand temperatures up to 1050° F.

Plastic Countersunk Washers

Plastic washers are good electrical insulators.

Electrical-Insulating Sleeve Washers

Also known as shoulder washers.

Extra-Tall Electrical-Insulating
Rolled-Collar Sleeve Washers

The extra-tall sleeve extends into holes to provide more protection than other rolled-collar washers.

Electrical-Insulating Rolled-Collar Sleeve Washers

As you tighten your screw, the rolled collar compresses under the head to create an insulating barrier between a screw shank and a mating surface.

Electrical-Insulating Cup Sleeve Washers

These washers have a flat bottom and high walls to protect metal screw heads from electrical current.

Self-Retaining Washers

A specially shaped ID grips your screw shank tightly.

Plastic Washers for Rigid Insulation

Plastic washers resist moisture, chemicals, and friction and are good electrical insulators.

Spring Lock Washers for Plastic Screws

Designed for use with plastic screws, these acetal washers are good electrical insulators. They are excellent for use under water and in rotating assemblies.

Sealing Washers

Weather-Resistant Rubber Sealing Washers

Sunlight, ozone, and water won’t affect these washers.

Oil-Resistant Rubber Sealing Washers

These washers surpass other rubber washers when it comes to withstanding oil, grease, and fuel.

Abrasion-Resistant Rubber
and Plastic Sealing Washers

Made of durable material, these washers resist wear from rubbing and scraping surfaces.

Chemical-Resistant Rubber Sealing Washers

These washers withstand harsh chemicals such as acetic acid and isopropyl alcohol.

Metal Sealing Washers

Also known as crush washers, these compress when tightened to form a tighter, more durable seal than rubber washers. They are commonly used to seal fluids such as oil and fuel.

Cushioning Washers

Abrasion-Resistant Cushioning Washers

These SBR rubber washers are reinforced with cloth fibers.

Abrasion-Resistant Leather Washers

These leather washers are nonmarring.

Cushioning Washers

These wool felt washers can be soaked with oil to lubricate joints.

Moisture-Resistant Cushioning Washers

These polyurethane washers withstand wet conditions as well as sunlight, ozone, and some chemicals.

Shims

Ring Shims

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

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.

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.

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.

Large-Adjustment Slotted Shims

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

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.

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.

Slotted Tapered Shims

The slot lets you install these rigid shims around screws.

Tapered Shims

Ridges keep these shims from sliding apart when stacked.

Slip-Resistant Shim Plates

The textured surface of these thick shims keeps them from sliding apart when stacked. Use them to align cabinets, doors, and windows, or for other rough leveling.

Breakaway Shim Plates

These thick shims are scored to make size adjustments easy—break off the excess shim for a custom fit around fasteners or corners. Use them to align cabinets, doors, and windows, or for other rough leveling.

Unthreaded Spacers

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.

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.

Acetal Unthreaded Spacers

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

Polypropylene Unthreaded Spacers

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

PEEK Unthreaded Spacers

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

Polycarbonate Unthreaded Spacers

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

Electrical-Insulating Unthreaded Spacers

Protect components from electrical charges.

Unthreaded Spacer Stock

Cut stock to the length you need.

Unthreaded Spacers for Tubes

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

Fastener Assortments

USS Washer Assortments

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

Washer Assortments

SAE Washer Assortments

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

Oversized Washer Assortments

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

Sleeve Washer Assortments

Also known as shoulder and insulator washers, these nonmetal washers block electrical current and prevent corrosion from mating different types of metal.

Fastener Maintenance Assortments

Push-On Retaining Caps

Use these caps to hold components in place and protect shaft ends.

Plastic Snap-In Nuts

These nylon nuts are chemical resistant, nonconductive, and lightweight.

Quarter-Turn Captive Panel Screws

Rounded Head Quarter-Turn Captive
Panel Screws with Rivet-Mount Nut

These rounded head nuts can be riveted into thin panels for a flush fit. They can be mounted without spaces between the panels. A quarter-turn locks and releases access panels, doors, and covers.

Wing Head Quarter-Turn Captive
Panel Screws with Rivet-Mount Nut

Rivet these wing head nuts into thin panels for a flush fit. They can be mounted without space between panels. A quarter-turn locks and releases access panels, doors, and covers.

Wing Head Quarter-Turn Captive
Panel Screws with Clip-On Nut

These wing-head screws have a clip-on nut that allows you to mount them near the edge of a thin panel. Use them to lock and release access panels, doors, and covers with a quarter-turn.

Rounded Head Quarter-Turn Captive
Panel Screws with Clip-On Nut

These rounded head screws have a nut that clips onto the edge of a thin panel, allowing you to mount the screw near edges. A quarter-turn locks and releases access panels, doors, and covers.

Bearings

Light Duty Dry-Running Thrust Bearings

Use where high loads and speeds are not required.

Ultra-Low-Friction Dry-Running Thrust Bearings

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

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.

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.

Needle-Roller Thrust Bearings

Thinner rollers allow these bearings to fit in tighter spaces than tapered-roller thrust bearings.

Thrust Ball Bearings

Steel balls and washers allow these bearings to handle higher loads than bearings with stainless steel components.

Corrosion-Resistant Thrust Ball Bearings

A combination of stainless steel and nylon components provide increased corrosion resistance over standard thrust ball bearings.

Sealing and Coating

Ultra-Chemical-Resistant Rigid PTFE O-Rings

Rigid and hard with a slippery surface, these PTFE O-rings resist harsh chemicals, such as acetone, fluorinated solvents, methanol, and boric acid.

Ultra-Chemical-Resistant Rigid PTFE O-Rings for
Tube Fittings with Straight-Thread Connection

These temperature- and chemical-resistant O-rings prevent leaks in tube fittings that have a straight-thread connection, also known as O-ring boss fittings.

Ultra-Chemical-Resistant Rigid PTFE O-Rings
for High-Polish Metal Sanitary Tube Fittings

Pair these O-rings with metric sanitary fittings, which are commonly known as aseptic fittings. Made of PTFE, they’re rigid with a slippery surface and resist harsh chemicals such as acetone, fluorinated solvents, methanol, and boric acid.

Ultra-Chemical-Resistant
FEP-Encapsulated Silicone O-Rings

The FEP casing on these O-rings provides the same level of resistance to harsh chemicals as PTFE O-rings, but the core material is soft to make these O-rings more compressible.

Ultra-Chemical-Resistant FEP-Encapsulated
Viton® Fluoroelastomer O-Rings

Unlike silicone, the Viton® fluoroelastomer core will continue to ward of chemicals should the FEP casing wear away.

Ultra-Chemical-Resistant PTFE Backup Rings

These PTFE backup rings resist harsh chemicals, such as acetone, fluorinated solvents, methanol, and many acids.

Backup Ring Assortments

These 325-piece assortments mean you’ll always have a backup ring on hand.

Ultra-Chemical-Resistant Rigid
PTFE O-Ring Assortments

Rigid and hard with a slippery surface, these O-rings resist harsh chemicals, such as acetone, fluorinated solvents, methanol, and boric nitric, and sulfonic acids.

High-Speed Rotary Shaft Seals

A slippery PTFE surface allows these seals to function at speeds at least 25% faster than other rotary shaft seals.

Concrete Brooms

Drag these brooms along hardening concrete to create a rough surface for traction in slippery environments.

Building and Machinery Hardware

Expandable Grommets

The center hole has flaps that flex to hold and protect various sizes of wire, cable, and cords while keeping out dust and debris. Push these grommets into place. They turn rough-edged and uneven holes into smooth, insulated holes.

Locking Grommets

These grommets snap into place and have wings that expand against the sides of the hole to lock them in position. Use them to protect wire, cable, and cords by turning rough-edged and uneven holes into smooth holes.

Expandable Locking Grommets

The center hole has flaps that flex to hold and protect various sizes of wire, cable, and cords while keeping out dust and debris. Snap these grommets into place and their wings expand against the sides of the hole to lock them in position. Use them to turn rough-edged and uneven holes into smooth holes.

Split Grommets

A slit in the side of these grommets allows you to install them around wire, cable, and cords that are already in place. They snap into the hole and their wings hold them tight. Use them to turn rough-edged and uneven holes into smooth, insulated holes.

Shrink-to-Fit Sealing Grommets

Apply heat and these grommets shrink around wire, cable, and cords to keep out dust, debris, and moisture.

Snap-In Pipe and Tubing Grommets

These grommets have two flanges that snap around holes and flex to compensate for misalignment and movement of pipe and tubing. They're often used for routing applications in panel walls.

Push-In Pipe and Tubing Grommets

Press these flexible grommets into holes and their tapered inner wall will expand when pipe or tubing is inserted to hold them snugly in place. They're often used for routing applications on metal, plastic, and fiberglass tanks.

Shaft Grommets

Support shafts, bearings, and other moving parts that are routed through a hole. These grommets are slippery to allow parts to move freely in the hole. Install them on thin sheet-metal panels.

Snap-In Fabric Grommets

No setting tools needed—snap the two parts together in a hole you've already cut to strengthen the hole and eliminate fraying. Use these grommets in tarps, covers, curtains, and other material.

Furniture Grommets

Eliminate clutter on desktops, countertops, benchtops, and other work surfaces by organizing wire, cable, and cords.

Expandable Furniture Grommets

The center hole has flaps that flex to accommodate various sizes of wire, cable, and cords while still providing dust and debris protection. Use these grommets to eliminate cord clutter on desktops, countertops, benchtops, and other work surfaces.

Brush-Style Furniture Grommets

Wire, cable, and cords pass through the grommet opening while the bristles fill in the gaps to control dust and debris. Use these grommets to eliminate cord clutter on desktops, countertops, benchtops, and other work surfaces.

Vibration-Damping Washers

Use these in place of normal washers to damp vibration and cushion your joint.

Vibration-Damping Grommets

Press these grommets into a hole to add cushion on both sides.

Ribbed Vibration-Damping Grommets

Ribbed grommets are more flexible than our smooth vibration-damping grommets, so they're easier to install.

Janitorial and Cleaning

Corrosion-Inhibiting Washers for Battery Terminals

Stop corrosion caused by battery acid fumes leaking at the posts of battery terminals.

Metal-Detectable Scouring Pads

Scrub out kettles, fryers, and other equipment without fear of contaminating food lines—these pads set off your metal detector if they fall into your line.

Portable Hand Washing Stations

To prevent the spread of illness, these stations give people a place to wash their hands, wherever they need it.

Plumbing Fixtures and Drains

Faucet Washers

Faucet Washer Assortments

Replacement Washers for Slip-Joint Fittings

Replacement Adapter Washers for Slip-Joint Fittings

These adapters connect 1 ¼” OD pipe to 1 ½” OD pipe.

Toilet and Urinal Sealing Rings

Air Nozzles

These premium nozzles are engineered for the most efficient airflow consumption.

Wide-Airflow Air Nozzles

The flat nozzle tip distributes air over a wider area than focused-airflow nozzles.

Food Industry Wide-Airflow Air Nozzles

These nozzles are made of FDA-listed materials.

Bend-and-Stay Air Nozzles

Nozzles are attached to a flexible tube or hose that bends and holds its shape until you reposition it.

Magnet-Mount Bend-and-Stay Air Nozzles

The magnetic base mounts to your work surface and has a control valve for adjusting airflow.

Create-Your-Own Bend-and-Stay Air Nozzles

Choose a base, hose, and nozzle for a custom setup.

Wedge Air Nozzles

Shaped to fit into extremely tight spaces, these nozzles can be used to remove parts from molds. Tap the wedge into position, attach the nozzle to a blowgun, and activate the airflow to release the part.

Parts Washers

Replacement Parts for Parts Washers

Parts Washers for Water-Based Solutions

Mobile Parts Washers for Water-Based Solutions

A dolly with casters makes it easy to move these parts washers around your facility.

Bench-Top Parts Washers for Water-Based Solutions

Clean small parts with these compact washers.

Plastic Round Parts Baskets

These baskets have a fine nylon mesh construction and plastic frame.

Acid-Resistant Plastic Round Parts Baskets

Made of polypropylene, these baskets withstand most acids and chemicals.

Cord Bushings

More rigid than grommets, these bushings guard cords from rubbing against the edges of holes in enclosures and panels and wearing down.

Continuous-Flex Cord Bushings

A spring extension prevents sharp bends and kinks in your cord, prolonging its life. These bushings, which are more rigid than grommets, shield cords from rubbing against the edges of holes in enclosures and panels, so they won’t wear down.

Tag Rings

Loop these rings onto tags.

Plastic Y-Strainers

Compact Plastic Y-Strainers

Small in size, these strainers fit into tight spaces. They are made of lightweight Noryl PPO, which provides excellent corrosion resistance.

PVC Y-Strainers

Polypropylene Y-Strainers

CPVC Y-Strainers

Made of CPVC, these lightweight strainers have excellent corrosion resistance and withstand higher temperatures than all of our other plastic Y-strainers.

High-Capacity Plastic Y-Strainers

A wide two-piece body holds more debris than other plastic Y-strainers. The body comes apart for easy cleaning without disconnecting your line.

Clear-View Inline Strainers

These strainers are clear so you can monitor debris collecting in the screen.

Plastic Basket Strainers

Easy-Swap Plastic Basket Strainers

No need to shut down your operation to service your strainer—these have two baskets so you can divert flow to one basket while you work on the other.

Polyester Basket Strainers

Polyester strainers withstand temperatures up to 120° F.

CPVC Basket Strainers

CPVC can handle higher temperatures than PVC and polyester. Use for applications up to 180° F.

PVC Basket Strainers

PVC strainers withstand temperatures up to 140° F.

Metal Washers

General Purpose Washers

Metric General Purpose Washers

Oversized Washers

Metric Oversized Washers

Mil. Spec. Washers

SAE Washers

USS Washers

ASME Washers for Soft Material

Washers with Material Certification

Washers for Structural Applications

Metric Washers for Structural Applications

Washers for Blind Rivets

Plastic Washers

Plastic Washers

Metric Plastic Washers

Mil. Spec. Plastic Washers

Chemical-Resistant Plastic Washers

Metric Chemical-Resistant Plastic Washers

Mil. Spec. Chemical-Resistant Plastic Washers

Electrical-Insulating Plastic Washers

Metric Electrical-Insulating Plastic Washers

Water- and Steam-Resistant Plastic Washers

Metric Water- and Steam-Resistant Plastic Washers

High-Temperature Plastic Washers

Metric High-Temperature Plastic Washers

Ceramic and Mica Washers

Extreme-Temperature Ceramic Washers

Metric Extreme-Temperature Ceramic Washers

High-Temperature Mica Washers

Plastic Countersunk Washers

Plastic Countersunk Washers

Electrical-Insulating Sleeve Washers

Electrical-Insulating Sleeve Washers

Extra-Tall Electrical-InsulatingRolled-Collar Sleeve Washers

Electrical-Insulating Rolled-Collar Sleeve Washers

Electrical-Insulating Cup Sleeve Washers

Self-Retaining Washers

Self-Retaining Washers

Plastic Washers for Rigid Insulation

Plastic Washers for Rigid Insulation

Spring Lock Washers for Plastic Screws

Spring Lock Washers for Plastic Screws

Sealing Washers

Weather-Resistant Rubber Sealing Washers

Oil-Resistant Rubber Sealing Washers

Abrasion-Resistant Rubberand Plastic Sealing Washers

Chemical-Resistant Rubber Sealing Washers

Metal Sealing Washers

Cushioning Washers

Abrasion-Resistant Cushioning Washers

Abrasion-Resistant Leather Washers

Cushioning Washers

Moisture-Resistant Cushioning Washers

Shims

Ring Shims

Color-Coded Ring Shims

Color-Coded Ring Shim Sets

Color-Coded Slotted Shims

Color-Coded Slotted Shim Sets

Large-Adjustment Slotted Shims

Breakaway Slotted Shims

Color-Coded Horseshoe Shims

Interlocking Color-Coded Horseshoe Shims

Shims for Hinges

Slotted Tapered Shims

Tapered Shims

Slip-Resistant Shim Plates

Breakaway Shim Plates

Unthreaded Spacers

Nylon Unthreaded Spacers

Polyethylene Unthreaded Spacers

PTFE Unthreaded Spacers

Acetal Unthreaded Spacers

Polypropylene Unthreaded Spacers

PEEK Unthreaded Spacers

Polycarbonate Unthreaded Spacers

Electrical-Insulating Unthreaded Spacers

Unthreaded Spacer Stock

Unthreaded Spacers for Tubes

Extra-Tall Electrical-Insulating
Rolled-Collar Sleeve Washers

Abrasion-Resistant Rubber
and Plastic Sealing Washers

Rounded Head Quarter-Turn Captive
Panel Screws with Rivet-Mount Nut

Wing Head Quarter-Turn Captive
Panel Screws with Rivet-Mount Nut

Wing Head Quarter-Turn Captive
Panel Screws with Clip-On Nut

Rounded Head Quarter-Turn Captive
Panel Screws with Clip-On Nut

Ultra-Chemical-Resistant Rigid PTFE O-Rings for
Tube Fittings with Straight-Thread Connection

Ultra-Chemical-Resistant Rigid PTFE O-Rings
for High-Polish Metal Sanitary Tube Fittings

Ultra-Chemical-Resistant
FEP-Encapsulated Silicone O-Rings

Ultra-Chemical-Resistant FEP-Encapsulated
Viton® Fluoroelastomer O-Rings

Ultra-Chemical-Resistant Rigid
PTFE O-Ring Assortments