M2.5 Washers | McMaster-Carr

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System of Measurement

Screw Size

OD

Material

Stainless Steel

Washer Type

ID

Thickness

0.037" to 0.049"

0.2 mm to 0.5 mm

0.3 mm to 0.5 mm

0.4 mm to 0.6 mm

0.5 mm to 0.6 mm

0.5 mm to 0.7 mm

0.6 mm to 0.9 mm

0.6 mm to 1.0 mm

0.7 mm to 0.9 mm

0.8 mm to 1.2 mm

Finish

Specifications Met

Color

Overall Height

Length

Washer Designation

General Purpose

ASME Designation

Passivation

DFARS Specialty Metals

REACH

RoHS

Compliant with Exemptions

Performance

Chemical Resistant

Corrosion Resistant

Electrically Insulating

Heavy Vibration Resistant

High Temperature

Impact Resistant

Moisture Resistant

Export Control Classification Number (ECCN)

Shape

Tooth Location

Maximum Temperature

Less than 250° F

250° F to 299° F

300° F to 499° F

500° F to 999° F

Fastener Strength Grade/Class

Sleeve OD

How can we improve?

110 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

Self-Retaining Washers

Self-Retaining Washers

Assemble screws and washers in advance to save time

Clipped Washers

Clipped Washers

Clipped on one side to fit in tight spots

Other Products

Lock Washers

Resist vibration to prevent fasteners from loosening

Insulating Washers

Insulating Washers

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

Sealing Washers

Sealing Washers

Prevent fluids from leaking around fasteners

Spacers

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

Finishing Washers

Finishing Washers

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

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