ASTM Flat Washers | McMaster-Carr

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Specifications Met

ASTM F436 Type 1

ASTM F959 Type A325

ASTM F959 Type A490

Screw Size

Material

841 Bearing Bronze

Stainless Steel

ID

OD

Thickness

0.005" to 0.006"

0.010" to 0.020"

0.013" to 0.027"

Finish

Washer Type

Fastener Strength Grade/Class

ASTM Grade A325

ASTM Grade A490

System of Measurement

Application

Shape

Performance

Chemical Resistant

Corrosion Resistant

Electrically Insulating

High Temperature

Low Temperature

Precision Adjust

Tension Indicating

Shaft Diameter

Washer Designation

General Purpose

DFARS Specialty Metals

Color

RoHS

Compliant with Exemptions

Export Control Classification Number (ECCN)

REACH

Fastener Strength Rating

Hardness

Tension Indicated

Military Specification

Maximum Temperature

250° F to 499° F

500° F to 999° F

Minimum Hardness

How can we improve?

1,244 Products

Washers

General Purpose Washers

General Purpose Washers

Your go-to metal washer for every screw size

Structural Washers

Structural Washers

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

Tension-Indicating Structural Washers

Tension-Indicating Structural Washers

Change color when you apply the correct tension to prevent overtightening

Plastic Washers

Plastic Washers

Lightweight, nonconductive, and naturally rust resistant

Other Products

Shims

Align and space components on shafts, or level machinery, cabinets, and doors

Thrust Bearings

Thrust Bearings

Support loads parallel to the shaft with plain, ball, or roller bearings

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