Structural Washers | McMaster-Carr

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System of Measurement

Screw Size

Fastener Strength Grade/Class

ASTM Grade A325

ASTM Grade A490

Material

Stainless Steel

Finish

Hot-Dipped Galvanized

Zinc Flake Coated

Washer Type

Application

Shaft Diameter

Specifications Met

ID

OD

Thickness

0.020" to 0.042"

0.024" to 0.038"

0.025" to 0.035"

0.025" to 0.040"

0.027" to 0.033"

0.028" to 0.034"

0.034" to 0.060"

0.036" to 0.044"

0.036" to 0.045"

0.041" to 0.053"

0.042" to 0.051"

0.043" to 0.053"

0.043" to 0.057"

0.044" to 0.051"

0.046" to 0.054"

0.048" to 0.075"

0.054" to 0.066"

0.054" to 0.070"

Hardness

Rockwell 15N 80

Performance

Corrosion Resistant

Tension Indicating

Length

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Fastener Strength Rating

RoHS

Compliant with Exemptions

Color

DFARS Specialty Metals

REACH

Export Control Classification Number (ECCN)

Tension Indicated

For Use In

Inside Width

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Washers

Structural Washers

Structural Washers

Distribute pressure under structural screws and nuts in columns, joists, and I-beams

Square Washers

Won't rotate as you fasten screws in slots and channels

Tension-Indicating Structural Washers

Tension-Indicating Structural Washers

Change color when you apply the correct tension to prevent overtightening

Notched Washers

Notched Washers

Hammer nails into the notches to prevent rotation.

Beveled Washers

Beveled Washers

The thickest washers we offer, designed for heavy duty wood construction

Washers for Square-Neck Bolts

Washers for Square-Neck Bolts

The square hole fits snugly around carriage, plow, and elevator bolts

Rectangular Washers

Rectangular Washers

Our narrowest washers to fit in thin channels, slots, and other tight spaces

Other Products

Leveling Washers

Leveling Washers

Curved or tapered to compensate for uneven mounting surfaces

Cross-Bracing Washers

Cross-Bracing Washers

Connect cross-bracing rods or cables to structural beams; also known as hillside washers

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)