M4 Washers | McMaster-Carr

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Screw Size

System of Measurement

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

Specifications Met

Washer Designation

General Purpose

Color

ASME Designation

Performance

Chemical Resistant

Corrosion Resistant

Electrically Insulating

High Temperature

Impact Resistant

Moisture Resistant

Precision Adjust

Overall Height

Passivation

Length

RoHS

Compliant with Exemptions

DFARS Specialty Metals

REACH

Fastener Strength Grade/Class

Hardness

Tooth Location

Internal and External

Shape

Export Control Classification Number (ECCN)

Adhesive Thickness

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

Fastening and Joining

Washers

Nearly every size and shape imaginable, from flat washers to clipped to curved

Lock Washers

Resist vibration to prevent fasteners from loosening

Sealing Washers

Sealing Washers

Prevent fluids from leaking around fasteners

Finishing Washers

Finishing Washers

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

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

Spacers

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

Shims

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

Unthreaded Inserts

Unthreaded Inserts

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

Magnets

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

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