Insulating Flat Washers | McMaster-Carr

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Washer Type

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Chemical Resistant

Electrically Insulating

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Impact Resistant

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Moisture Resistant

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Less than 200° F

200° F to 249° F

250° F to 499° F

500° F to 999° F

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1,173 Products

Washers

Plastic Washers

Plastic Washers

Lightweight, nonconductive, and naturally rust resistant

Ultra-High-Temperature Ceramic Washers

Ultra-High-Temperature Ceramic Washers

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

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

Very-High-Temperature Mica Washers

Very-High-Temperature Mica Washers

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

Plastic Washer Assortments

Plastic Washer Assortments

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

Mil. Spec. Plastic Washers

Mil. Spec. Plastic Washers

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

Other Products

Insulating Washers

Insulating Washers

Isolate screws from electrical current and prevent corrosion from mating different metals

Cushioning Washers

Cushioning Washers

Cushion joints to dampen vibration and protect them from wear

Sealing Washers

Sealing Washers

Prevent fluids from leaking around fasteners

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