Finishing Washers | McMaster-Carr

	System of Measurement System of Measurement

Inch

Metric

	For Screw Size For Screw Size

	Material Material

	Finish Finish

Hot-Dipped Galvanized

Black Ultra-Corrosion-
Resistant Coated

Blue Dyed

	OD OD

	ID ID

	Washer Type Washer Type


Countersunk	Flat

Cup for Oversized Holes	Square-Neck Bolt Lock

	Countersink Angle Countersink Angle

82°

90°

100°

	Overall Height Overall Height

	Hardness Hardness

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

RoHS Compliant

RoHS Compliant with
Exemptions

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

REACH Compliant

	Maximum Thickness Maximum Thickness

	Minimum Thickness Minimum Thickness

	Color Color

	Black
	Off-White
	White

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

DFARS Specialty Metals
COTS-Exempt

DFARS Specialty Metals
Compliant

	Specifications Met Specifications Met

DIN

ISO

ASME

	Inside Width Inside Width

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About 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.

Plastic Countersunk Washers

Plastic washers are good electrical insulators.

Finishing Countersunk Washers

Metric Finishing Countersunk Washers

General Purpose 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

Cup Washers for Oversized Holes

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

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.