Key Lock Washers | McMaster-Carr

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System of Measurement

Screw Size

Material

Stainless Steel

Washer Type

OD

ID

Thickness

0.010" to 0.013"

0.010" to 0.015"

0.010" to 0.016"

0.012" to 0.018"

0.014" to 0.018"

0.014" to 0.020"

0.015" to 0.019"

Finish

Zinc Flake Coated

Zinc Yellow-Chromate Plated

Tooth Location

Internal and External

Performance

Corrosion Resistant

Extreme Vibration Resistant

Precision Adjust

Specifications Met

Color

Hardness

DFARS Specialty Metals

RoHS

Compliant with Exemptions

REACH

Length

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Export Control Classification Number (ECCN)

Shaft Diameter

Overall Height

Military Specification

Military Specification

For Use With

Socket Head Screws

Square-Neck Bolts

Shape

Height

Maximum Temperature

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1,753 Products

Lock Washers

Split Lock

Split Lock Washers

Split Lock Washers

Stop nuts and screws from loosening due to light vibration

Mil. Spec. Split Lock Washers

Mil. Spec. Split Lock Washers

Adhere to U.S. military standards for material and construction

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

Mil. Spec. Tooth Lock Washers

Mil. Spec. Tooth Lock Washers

Adhere to U.S. military standards for material and construction

Countersunk Tooth Lock Washers

Countersunk Tooth Lock Washers

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

Domed Tooth Lock Washers

Domed Tooth Lock Washers

Spread pressure over a large area to limit damage to material

Tooth Lock Washer Assortments

Tooth Lock Washer Assortments

Keep a collection of tooth lock washers on hand to work with a range of screw sizes

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

Spring Lock

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

Wave Spring Lock Washers

Wave Spring Lock Washers

Keep bolted assemblies secure on slightly uneven surfaces

Tab Lock

Tab Lock Washers

Tab Lock Washers

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

Coil Lock

Coil Lock Washers

Coil Lock Washers

Create more tension than split lock washers for a tighter hold on materials that contract and expand

Other Products

Washers

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

Shims

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

Spacers

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

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