Flat Spacers | McMaster-Carr

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5,612 Products

Washers

Oversized Washers

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

973 products

Plastic Washers

Lightweight, nonconductive, and naturally rust resistant

888 products

General Purpose Washers

Your go-to metal washer for every screw size

601 products

Mil. Spec. Washers

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

561 products

Self-Retaining Washers

Assemble screws and washers in advance to save time

61 products

Hard Fiber Washers

Least likely to scratch delicate mounting surfaces

91 products

Undersized Washers

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

142 products

SAE Washers

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

350 products

Ultra-High-Temperature Ceramic Washers

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

29 products

ASME Washers

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

374 products

Mil. Spec. Plastic Washers

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

68 products

Fiberglass Washers

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

77 products

USS Washers

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

217 products

Adhesive-Back Washers

Stick on your surface to prevent slipping while you fasten

19 products

Structural Washers

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

54 products

Washers for Foam Insulation

Prevent screws from crushing insulation board

4 products

Tension-Indicating Structural Washers

Change color when you apply the correct tension to prevent overtightening

41 products

Washers for Blind Rivets

Sized to fit around blind rivet diameters

18 products

Washers for Square-Neck Bolts

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

30 products

Plastic Washer Assortments

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

1 product

Extra-High-Temperature Mica Washers

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

7 products

Finish-Your-Own Washers

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

66 products

USS Washer Assortments

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

1 product

Magnetic Washers

Stay in place on iron and steel surfaces during installation

7 products

Perforated Washers

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

2 products

Oversized Washer Assortments

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

3 products

SAE Washer Assortments

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

3 products

General Purpose Washer Assortments

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

5 products

Other Products

Cushioning Washers

Cushion joints to dampen vibration and protect them from wear

158 products

Sealing Washers

Prevent fluids from leaking around fasteners

752 products

Fastener Assortments

Keep a variety of common screws, nuts, and washers on hand

8 products

Battery-Terminal Washers

Stop battery acid fumes from corroding terminal posts

1 product