M4 Washers | McMaster-Carr

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System of Measurement

Screw Size

Material

Stainless Steel

Washer Type

ID

Thickness

0.022" to 0.042"

0.023" to 0.033"

0.035" to 0.055"

0.049" to 0.061"

0.052" to 0.072"

0.060" to 0.080"

0.080" to 0.100"

0.085" to 0.096"

Finish

Corrosion-Resistant Coated

Phosphate Coated

Zinc Flake Coated

Zinc Yellow-Chromate Plated

Washer Designation

General Purpose

Specifications Met

Color

ASME Designation

Overall Height

Performance

Chemical Resistant

Corrosion Resistant

Electrically Insulating

High Temperature

Impact Resistant

Moisture Resistant

Precision Adjust

Length

RoHS

Compliant with Exemptions

Passivation

Fastener Strength Grade/Class

DFARS Specialty Metals

REACH

Tooth Location

Internal and External

Hardness

Export Control Classification Number (ECCN)

Adhesive Thickness

Shape

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

How can we improve?

482 Products

Washers

General Purpose Washers

General Purpose Washers

Your go-to metal washer for every screw size

Oversized Washers

Oversized Washers

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

ASME Washers

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

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

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

Ultra-High-Temperature Ceramic Washers

Ultra-High-Temperature Ceramic Washers

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

Self-Retaining Washers

Self-Retaining Washers

Assemble screws and washers in advance to save time

Adhesive-Back Washers

Adhesive-Back Washers

Stick on your surface to prevent slipping while you fasten

Clipped Washers

Clipped Washers

Clipped on one side to fit in tight spots

Other Products

Lock Washers

Resist vibration to prevent fasteners from loosening

Finishing Washers

Finishing Washers

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

Sealing Washers

Sealing Washers

Prevent fluids from leaking around fasteners

Spacers

Unthreaded to create space between two surfaces or objects, often to align them

Insulating Washers

Insulating Washers

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

Leveling Washers

Leveling Washers

Curved or tapered to compensate for uneven mounting surfaces

Shims

Align and space components on shafts, or level machinery, cabinets, and doors

Magnets

Attract or repel metal objects to hang, secure, or position them

Unthreaded Inserts

Unthreaded Inserts

Reinforce, align, and adjust joints as you tighten a fastener

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