Standard Lock Washers | McMaster-Carr

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System of Measurement

Screw Size

Material

Polyurethane Rubber

Stainless Steel

ID

Washer Type

OD

Thickness

Finish

Phosphate Coated

Zinc Flake Coated

Zinc Yellow-Chromate Plated

Shaft Diameter

Specifications Met

Tooth Location

Internal and External

Performance

Corrosion Resistant

Vibration Resistant

Hole Diameter

Height

RoHS

Overall Height

Disc Spring Type

DFARS Specialty Metals

REACH

Export Control Classification Number (ECCN)

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

Compressed Height @ Working Load

Hardness

Rockwell C40 to Rockwell C50

Deflection @ Working Load

Less than 0.125"

0.125" to 0.249"

0.25" to 0.499"

1 mm to 1.99 mm

2 mm to 4.99 mm

5 mm to 9.99 mm

10 mm or greater

Color

Military Specification

MIL-W-12133/2-093

MIL-W-12133/2-100

MIL-W-12133/2-125

MIL-W-12133/2-156

MIL-W-12133/2-190

MIL-W-12133/2-200

MIL-W-12133/2-255

MIL-W-12133/2-317

MIL-W-12133/2-380

MIL-W-12133/2-400

MIL-W-12133/2-505

MIL-W-12133/2-567

MIL-W-12133/2-630

MIL-W-12133/2-755

MIL-W-12133/2-900

How can we improve?

3,504 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

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

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

Springs

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

Washers

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

Bearing Lock Washers

Bearing Lock Washers

Lock bearing nuts in place to prevent loosening due to vibration

Clamp Holding Washers

Clamp Holding Washers

Replace worn washers on open-arm toggle clamps to keep holding screws in place

Tie-Down Washers

Tie-Down Washers

Angled sides align and hold tie-down straps

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