Fixture Washers | McMaster-Carr

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System of Measurement

Screw Size

Material

Stainless Steel

OD

ID

Thickness

0.001" to 0.003"

0.002" to 0.004"

0.004" to 0.006"

0.005" to 0.006"

0.005" to 0.024"

0.005" to 0.030"

0.008" to 0.012"

0.009" to 0.012"

0.010" to 0.013"

0.010" to 0.020"

0.010" to 0.030"

0.010" to 0.040"

0.011" to 0.021"

0.012" to 0.018"

0.013" to 0.017"

0.013" to 0.019"

0.013" to 0.020"

0.013" to 0.027"

Washer Type

Finish

Corrosion-Resistant Coated

Zinc Flake Coated

Zinc Yellow-Chromate Plated

Performance

Chemical Resistant

Corrosion Resistant

Electrical Insulating

Finish-Your-Own

Flame Retardant

High Temperature

Impact Resistant

Low Temperature

Moisture Resistant

Tension Indicating

Washer Designation

General Purpose

Color

Fastener Strength Grade/Class

ASTM Grade A325

ASTM Grade A490

Hardness

Specifications Met

Length

DFARS Specialty Metals

RoHS

Compliant with Exemptions

REACH

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

Export Control Classification Number (ECCN)

ASME Designation

Width

Fastener Strength Rating

Maximum Temperature

Less than 200° F

200° F to 249° F

250° F to 499° F

500° F to 999° F

1,000° F or greater

Overall Height

Certificate Type

Material Certificate with Traceable Lot Number

Material Certificate with Traceable Lot Number and Test Report

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5,436 Products

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Washers

Oversized Washers

Oversized Washers

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

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

Plastic Washers

Plastic Washers

Lightweight, nonconductive, and naturally rust resistant

Mil. Spec. Washers

Mil. Spec. Washers

Adhere to U.S. military standards for material and construction

Square Washers

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

Notched Washers

Notched Washers

Hammer nails into the notches to prevent rotation.

ASME Washers

Meet ASME standards and come in regular, narrow, and wide diameters

SAE Washers

Meet SAE sizing standards and typically have smaller diameters than USS washers

USS Washers

Meet USS sizing standards and typically have larger diameters than SAE washers

Clipped Washers

Clipped Washers

Clipped on one side to fit in tight spots

Self-Retaining Washers

Self-Retaining Washers

Assemble screws and washers in advance to save time

Hard Fiber Washers

Hard Fiber Washers

Least likely to scratch delicate mounting surfaces

Fiberglass Washers

Fiberglass Washers

Best strength-to-weight ratio of all our nonmetal washers

Mil. Spec. Plastic Washers

Mil. Spec. Plastic Washers

Meet U.S. military standards and are lightweight, nonconductive, and naturally rust resistant

Finish-Your-Own Washers

Finish-Your-Own Washers

Punch a hole to create a custom inner diameter for uncommon screw sizes

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

Easy-Install Slotted Washers

Easy-Install Slotted Washers

Slip under nuts and screws without having to disassemble them

Washers for Square-Neck Bolts

Washers for Square-Neck Bolts

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

Ultra-High-Temperature Ceramic Washers

Ultra-High-Temperature Ceramic Washers

Withstand the highest temperatures of all our washers up to 3000° F

Double-Clipped Washers

Double-Clipped Washers

Squeeze into tighter spots than single-clipped washers

Adhesive-Back Washers

Adhesive-Back Washers

Stick on your surface to prevent slipping while you fasten

Washers for Blind Rivets

Washers for Blind Rivets

Sized to fit around blind rivet diameters

Rectangular Washers

Rectangular Washers

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

Reinforcing Sleeve Washers

Reinforcing Sleeve Washers

Keep soft materials from collapsing into the hole

Curved Washers

Sit flush against rails, columns, and other structural tubes

Dished Washers

Cover oversized holes, such as the ends of pipe and tubes

Beveled Washers

Beveled Washers

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

Extra-High-Temperature Mica Washers

Extra-High-Temperature Mica Washers

Won't melt, stick, or become brittle, even when exposed to temperatures as high as 1050° F

Magnetic Washers

Magnetic Washers

Stay in place on iron and steel surfaces during installation

General Purpose Washer Assortments

General Purpose Washer Assortments

A collection of common washer sizes to fit the broadest range of applications

Washers for Foam Insulation

Washers for Foam Insulation

Prevent screws from crushing insulation board

Oversized Washer Assortments

Oversized Washer Assortments

A collection of exaggerated sizes to cover large holes or to create gaps

SAE Washer Assortments

SAE Washer Assortments

A range of sizes that meet SAE standards—typically have smaller diameters than USS washers

Square Washers for Blind Rivets

Square Washers for Blind Rivets

Won't rotate as you fasten blind rivets in slots and channels

Perforated Washers

Perforated Washers

Plaster flows through to form a bond between the washer and wall

Plastic Washer Assortments

Plastic Washer Assortments

A selection of lightweight, nonconductive, and naturally rust-resistant washers

USS Washer Assortments

USS Washer Assortments

A collection of sizes that meet USS specifications—typically larger diameters than SAE washers

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