ASME B18.21.1 Washers | McMaster-Carr

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System of Measurement

Screw Size

Material

Stainless Steel

Washer Type

Finish

Corrosion-Resistant Coated

Zinc Flake Coated

Zinc Yellow-Chromate Plated

OD

ID

Thickness

0.010" to 0.013"

0.010" to 0.015"

0.010" to 0.016"

0.012" to 0.018"

0.014" to 0.018"

0.014" to 0.020"

0.015" to 0.019"

0.016" to 0.018"

0.016" to 0.021"

0.016" to 0.022"

0.016" to 0.025"

0.017" to 0.021"

0.018" to 0.023"

0.018" to 0.024"

Fastener Strength Grade/Class

ASTM Grade A325

ASTM Grade A490

Washer Designation

General Purpose

Performance

Chemical Resistant

Corrosion Resistant

Electrically Insulating

High Temperature

Impact Resistant

Moisture Resistant

ASME Designation

Color

Fastener Strength Rating

Military Specification

Army-Navy Specification

Military Specification

Hardness

DFARS Specialty Metals

Tooth Location

Internal and External

RoHS

Compliant with Exemptions

REACH

Certification

Export Control Classification Number (ECCN)

Maximum Temperature

Less than 250° F

250° F to 299° F

300° F to 499° F

500° F to 999° F

1,000° F or greater

Minimum Temperature

-99° F to -50° F

-49° F to 0° F

Passivation

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1,516 Products

Fastening and Joining

Washers

Nearly every size and shape imaginable, from flat washers to clipped to curved

Lock Washers

Resist vibration to prevent fasteners from loosening

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