ISO Washers | McMaster-Carr

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

REACH Compliant

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

DFARS Specialty Metals
Compliant

	Color Color

	Black		White
	Gray		Clear

	For Shaft Diameter For Shaft Diameter

	Seal OD Seal OD

	Cross Section Shape Cross Section Shape

	Round

	Seal ID Seal ID

	Width Width

	Seal Width Seal Width

	For Use With For Use With

	For Motion Type For Motion Type

	Rotary

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753 Products

Metal 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.

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 Washers for Structural Applications

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

Thrust Roller Bearings

Washers for Needle-Roller Thrust Bearings

Adapt needle-roller thrust bearings to use on unhardened, unground surfaces.

Needle-Roller Thrust Bearings

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

Sealing and Coating

Oil-Resistant Buna-N O-Rings

Made of Buna-N, these O-rings resist grease, hydraulic oil, and motor oil—plus mild chemicals and water.

Chemical-Resistant High-Purity Clean
Room Viton® Fluoroelastomer O-Rings

These are the highest purity chemical-resistant O-rings we offer. They are made and bagged in an ISO Class 7 and Fed. Spec. Class 10,000 clean room, plus they’re USP VI certified; not for use in medical applications.

High-Temperature Clean Room Silicone O-Rings

Made and bagged in an ISO Class 7 (Fed. Std. Class 10,000) clean room, these are the highest purity high-temperature O-rings we offer.

Spring-Loaded Rotary Shaft Seals with Wiper Lip

These seals have a metal case that creates a tight seal when mating with smooth surfaces.

Bore-Sealing Spring-Loaded
Rotary Shaft Seals with Wiper Lip

Ribbed Buna-N over steel creates a tight seal with the bore, even when mating with a rough surface or in a split housing.

Spring-Loaded Rotary Shaft Seals

Also known as oil seals, use these to retain oil on rotating shafts in motors, pumps, bearings, and gearboxes. A spring secures the lip against the shaft, preventing messy leaks. Press-fit seals into the bore around the shaft.

Rotary Shaft Seals for Grease

Also known as grease seals, these are designed to retain thick lubricant at low pressure. They have a light grip on the shaft that creates less friction than spring-loaded seals.

Rings for Quick-Clamp High-Vacuum Fittings for Stainless Steel Tubing

Rings for Quick-Clamp High-Vacuum
Fittings for Stainless Steel Tubing

Use these rings with quick-clamp high-vacuum fittings.