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"

0.2 mm to 0.3 mm

Specifications Met

Finish

Corrosion-Resistant Coated

Phosphate Coated

Zinc Flake Coated

Zinc Yellow-Chromate Plated

Washer Designation

General Purpose

Performance

Chemical Resistant

Corrosion Resistant

Electrically Insulating

High Temperature

Impact Resistant

Moisture Resistant

Precision Adjust

Stress Resistant

Vibration Resistant

Color

Length

ASME Designation

Passivation

RoHS

Compliant with Exemptions

Overall Height

DFARS Specialty Metals

REACH

Hardness

Tooth Location

Internal and External

Shape

Fastener Strength Grade/Class

Export Control Classification Number (ECCN)

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

Adhesive Thickness

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.)