Metric Lock Washers | McMaster-Carr

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System of Measurement

Screw Size

Washer Type

Material

Stainless Steel

ID

OD

Finish

Phosphate Coated

Zinc Flake Coated

Zinc Yellow-Chromate Plated

Thickness

0.2 mm to 0.3 mm

0.2 mm to 0.4 mm

0.2 mm to 0.5 mm

0.3 mm to 0.4 mm

0.3 mm to 0.5 mm

Specifications Met

Tooth Location

Internal and External

Overall Height

Performance

Corrosion Resistant

Vibration Resistant

Color

Hardness

RoHS

DFARS Specialty Metals

REACH

Export Control Classification Number (ECCN)

For Use With

Slotted Bearing Nuts

Socket Head Screws

Serration Location

Shaft Diameter

Height

Disc Spring Type

For Bearing Nut Face Style

Tab Width

Working Load

Less than 1,000 lb.

1,000 lb. to 1,999 lb.

2,000 lb. to 2,999 lb.

3,000 lb. to 9,999 lb.

10,000 lb. or greater

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1,227 Products

Lock Washers

Split Lock

Split Lock Washers

Split Lock Washers

Stop nuts and screws from loosening due to light vibration

Split Lock Washers for Socket Head Screws

Split Lock Washers for Socket Head Screws

Fit neatly under screws with narrow heads

Split Lock Washer Assortments

Split Lock Washer Assortments

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

Tooth Lock

Tooth Lock Washers

Tooth Lock Washers

Grip tighter than split lock washers in applications with constant movement, such as conveyors

Countersunk Tooth Lock Washers

Countersunk Tooth Lock Washers

Grip flat- and oval-head screws for a secure hold without overtightening

Spring Lock

Heavy-Vibration-Resistant Spring Lock Washers

Heavy-Vibration-Resistant Spring Lock Washers

Won't loosen on equipment with constant, vigorous vibration; also known as Belleville washers

Heavy-Vibration-Resistant Spring Lock Washers for Socket Head Screws

Heavy-Vibration-Resistant Spring Lock Washers for Socket Head Screws

Fit neatly under screws with narrow heads; also known as Belleville washers

Wave Spring Lock Washers

Wave Spring Lock Washers

Keep bolted assemblies secure on slightly uneven surfaces

Curved Spring Lock Washers

Curved Spring Lock Washers

A step up from flat washers, these stop nuts and screws from loosening due to slight movement

Wedge Lock

Extreme-Vibration-Resistant Wedge Lock Washers

Extreme-Vibration-Resistant Wedge Lock Washers

The tightest grip of all our washers for use on equipment with jarring starts and stops

Tab Lock

Tab Lock Washers

Tab Lock Washers

Bend the tabs up or down to resist loosening from moderate vibration, such as pumps

Other Products

Bearing Lock Washers

Bearing Lock Washers

Lock bearing nuts in place to prevent loosening due to vibration

Springs

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

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