ASTM Flat Washers | McMaster-Carr

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Warning: Products have one, but not necessarily all, of the selected characteristics.

	System of Measurement System of Measurement

Inch

Metric

	For Screw Size For Screw Size

	Material Material

	Finish Finish

Galvanized

Hot-Dipped Galvanized

Zinc Plated

	Washer Type Washer Type


Flat	Tension Indicating

	ID ID

	OD OD

	Thickness Thickness

	Shape Shape


Ring	Made to Order

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

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

DFARS Specialty Metals
COTS-Exempt

DFARS Specialty Metals
Compliant

	Hardness Hardness

80-92

Rockwell C37

Rockwell C38

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

REACH Compliant

	Magnetic Properties Magnetic Properties

May Be Mildly Magnetic

Magnetic

Nonmagnetic

	Individual/Set Individual/Set

Individual

	Maximum Shim Size Maximum Shim Size

	Tension Indicated Tension Indicated

	Temper Rating Temper Rating

Softened (Annealed)

Full Hard

1/2 Hard

	Fastener Strength Grade/Class Fastener Strength Grade/Class

Class 8.8

Class 10.9

	For Shaft Diameter For Shaft Diameter

	Number of Layers Number of Layers

	Lubrication Lubrication

Lubricated

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1,138 Products

Fasteners

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.

Tension-Indicating Washers for Structural Applications

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

Ring Shims

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

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.

Ultra-Low-Friction Oil-Embedded Thrust Bearings

For applications with frequent starts and stops, the oil in these bearings contains particles of slippery PTFE that lubricate the bearing during startup.