Construction Washers | McMaster-Carr

	System of Measurement System of Measurement

Inch

Metric

	For Screw Size For Screw Size

	Washer Type Washer Type


Flat	Square

Leveling for I- Beams	Tension Indicating

For Cross- Bracing	Notched

	Material Material

	Finish Finish

Hot-Dipped
Galvanized

	Specifications Met Specifications Met

	Thickness Thickness

	Width Width

	ID ID

	OD OD

	Hardness Hardness

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

DFARS Specialty Metals
COTS-Exempt

DFARS Specialty Metals
Compliant

	Length Length

	For Shaft Diameter For Shaft Diameter

	Tension Indicated Tension Indicated

	Fastener Strength Grade/Class Fastener Strength Grade/Class

Class 8.8

Class 10.9

	Color Color

	Gray
	Red

	Maximum Load Maximum Load

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About Washers

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.

Metric Washers for Structural Applications

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

Square Washers

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

Washers for Cross-Bracing

Connect cross-bracing rods or cables to structural beams.

Flanged Washers for Cross-Bracing

These washers have a flange to spread force across structural beams better than standard washers for cross-bracing rods and cables.

Notched Washers for Wood

Also called No. 10 Western Timber and Victor washers, these have large ODs to prevent screws from sinking into wood. The notches allow you to temporarily secure them with nails to keep them from rotating during installation.