Thick Washers | McMaster-Carr

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2,794 Products

Washers

Oversized Washers

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

966 products

General Purpose Washers

Your go-to metal washer for every screw size

172 products

Mil. Spec. Washers

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

193 products

Plastic Washers

Lightweight, nonconductive, and naturally rust resistant

124 products

Square Washers

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

149 products

Structural Washers

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

45 products

Beveled Washers

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

8 products

USS Washers

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

137 products

SAE Washers

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

138 products

Easy-Install Slotted Washers

Slip under nuts and screws without having to disassemble them

9 products

Self-Retaining Washers

Assemble screws and washers in advance to save time

4 products

Notched Washers

Hammer nails into the notches to prevent rotation.

4 products

Undersized Washers

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

29 products

Reinforcing Sleeve Washers

Keep soft materials from collapsing into the hole

7 products

Clipped Washers

Clipped on one side to fit in tight spots

93 products

Washers for Foam Insulation

Prevent screws from crushing insulation board

3 products

ASME Washers

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

72 products

Tension-Indicating Structural Washers

Change color when you apply the correct tension to prevent overtightening

40 products

Fiberglass Washers

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

4 products

Hard Fiber Washers

Least likely to scratch delicate mounting surfaces

10 products

Oversized Washer Assortments

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

3 products

Washers for Square-Neck Bolts

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

2 products

Ultra-High-Temperature Ceramic Washers

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

4 products

Other Products

Lock Washers

Resist vibration to prevent fasteners from loosening

310 products

Insulating Washers

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

29 products

Cushioning Washers

Cushion joints to dampen vibration and protect them from wear

59 products

Leveling Washers

Curved or tapered to compensate for uneven mounting surfaces

84 products

Sealing Washers

Prevent fluids from leaking around fasteners

46 products

Finishing Washers

Screw heads sit flush to prevent snagging and to create a neat, finished appearance

37 products

Battery-Terminal Washers

Stop battery acid fumes from corroding terminal posts

1 product

Clamp Holding Washers

Replace worn washers on open-arm toggle clamps to keep holding screws in place

2 products

Bearing Lock Washers

Lock bearing nuts in place to prevent loosening due to vibration

10 products