Metric Washers | McMaster-Carr

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System of Measurement

Screw Size

Material

Stainless Steel

OD

Washer Type

ID

1 mm to 13.5 mm

Thickness

0.2 mm to 0.3 mm

0.2 mm to 0.4 mm

0.2 mm to 0.5 mm

0.203 mm to 0.508 mm

0.3 mm to 0.4 mm

Finish

Chromate Conversion Coated

Corrosion-Resistant Coated

Phosphate Coated

Zinc Flake Coated

Zinc Yellow-Chromate Plated

Specifications Met

NEBS GR-63-CORE

Washer Designation

General Purpose

Color

Performance

Abrasion Resistant

Chemical Resistant

Corrosion Resistant

Electrically Insulating

Finish-Your-Own

High Temperature

High Visibility

Impact Resistant

Metal Detectable

Overall Height

Fastener Strength Grade/Class

ASME Designation

Length

Thread Size

Shaft Diameter

9.500 mm to 11.500 mm

11.500 mm to 12.500 mm

Hardness

RoHS

Compliant with Exemptions

REACH

DFARS Specialty Metals

Shape

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

Tooth Location

Internal and External

How can we improve?

10,178 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

Structural Washers

Structural Washers

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

Tension-Indicating Structural Washers

Tension-Indicating Structural Washers

Change color when you apply the correct tension to prevent overtightening

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

Finish-Your-Own Washers

Finish-Your-Own Washers

Punch a hole to create a custom inner diameter for uncommon screw sizes

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

General Purpose Washer Assortments

General Purpose Washer Assortments

A collection of common washer sizes to fit the broadest range of applications

Oversized Washer Assortments

Oversized Washer Assortments

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

Clipped Washers

Clipped Washers

Clipped on one side to fit in tight spots

Square Washers

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

Reinforcing Sleeve Washers

Reinforcing Sleeve Washers

Keep soft materials from collapsing into the hole

Other Products

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

Shims

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

Leveling Washers

Leveling Washers

Curved or tapered to compensate for uneven mounting surfaces

Thrust Bearings

Thrust Bearings

Support loads parallel to the shaft with plain, ball, or roller bearings

Bearing Lock Washers

Bearing Lock Washers

Lock bearing nuts in place to prevent loosening due to vibration

Insulating Washers

Insulating Washers

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

Spacers

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

O-Rings

Fit snugly into a groove between parts to create a leak-resistant seal

Springs

Apply and absorb force with compression, die, extension, torsion, and disc springs

Retaining Rings

Retaining Rings

Hold components on a shaft

Bearing Washers

Bearing Washers

Adapt needle-roller thrust bearings for use on unhardened, unground surfaces

Tube Fitting Rings

Tube Fitting Rings

Prevent leaks at tubing connection points

Cushioning Washers

Cushioning Washers

Cushion joints to dampen vibration and protect them from wear

Magnets

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

Fastener Assortments

Fastener Assortments

Stay prepared by keeping fasteners in common sizes and materials on hand

Push Nuts

Press onto threads for a light duty hold that’s faster to install than typical nuts

Captive Panel Screws

Captive Panel Screws

Secure panels and enclosures while still having access to them

Strut Channel Framing and Fittings

Strut Channel Framing and Fittings

Secure fittings in the U-shaped channel to route conduit and pipe or build other structures

Grommets

Protect wire, cable, and cords from holes with sharp or rough edges

Shaft Seals

Prevent leaks in motors, pumps, and gearboxes

Unthreaded Inserts

Unthreaded Inserts

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

Snap-In Nuts

Push into square holes in thin materials to add bolts for aligning off-center parts

O-Ring Cord Stock

O-Ring Cord Stock

Cut to length to create customized seals

O-Ring Bonding Kits

O-Ring Bonding Kits

Everything needed to make O-rings

Wash Gun Nozzle Extensions

Wash Gun Nozzle Extensions

Attach to your wash gun nozzle to clean places out of arm's reach

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