ISO Standard Washers | McMaster-Carr

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System of Measurement

Screw Size

Material

Stainless Steel

OD

Washer Type

ID

Finish

Corrosion-Resistant Coated

Zinc Flake Coated

Zinc Yellow-Chromate Plated

Thickness

0.2 mm to 0.4 mm

0.3 mm to 0.4 mm

0.4 mm to 0.6 mm

0.5 mm to 0.6 mm

0.7 mm to 0.9 mm

0.8 mm to 1.2 mm

0.9 mm to 1.1 mm

1.3 mm to 1.9 mm

1.4 mm to 1.8 mm

1.7 mm to 2.3 mm

1.8 mm to 2.2 mm

2.2 mm to 2.8 mm

2.3 mm to 2.7 mm

2.3 mm to 2.8 mm

2.4 mm to 3.6 mm

2.7 mm to 3.3 mm

3.3 mm to 4.3 mm

Washer Designation

General Purpose

Fastener Strength Grade/Class

Performance

Chemical Resistant

Corrosion Resistant

High Temperature

Steam Resistant

Ultra Low Friction

Water Resistant

RoHS

Compliant with Exemptions

Hardness

Fastener Strength Rating

REACH

Color

Length

Shaft Diameter

DFARS Specialty Metals

Export Control Classification Number (ECCN)

Certificate Type

Material Certificate with Traceable Lot Number

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

Shape

Width

Bearing Type

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852 Products

Washers

General Purpose Washers

General Purpose Washers

Your go-to metal washer for every screw size

Undersized Washers

Undersized Washers

Pair with fasteners that have narrow heads, such as cheese and socket head screws

Oversized Washers

Oversized Washers

Exaggerated diameters or thicknesses to cover large holes or to create gaps

Other Products

Thrust Roller Bearing Washers

Thrust Roller Bearing Washers

Adapt needle-roller thrust bearings for use on unhardened, unground surfaces

O-Rings

Fit snugly into a groove between parts to create a leak-resistant seal

Shaft Seals

Prevent leaks in motors, pumps, and gearboxes

Tube Fitting Rings

Tube Fitting Rings

Snap onto push-to-connect fittings to identify different tubing lines

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.)