Cup Washers | McMaster-Carr

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System of Measurement

Screw Size

Material

Washer Type

Thickness

Shaft Diameter

Overall Height

Finish

Zinc Yellow-Chromate Plated

Height

Hole Diameter

Countersink Angle

Performance

Electrically Insulating

Disc Spring Type

Color

DFARS Specialty Metals

Working Load

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

Export Control Classification Number (ECCN)

REACH

RoHS

Compliant with Exemptions

Not Compliant

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

Diameter

Compressed Height @ Working Load

Hardness

Deflection @ Working Load

2,467 Products

Fastening and Joining

Finishing Washers

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

156 products

Lock Washers

Resist vibration to prevent fasteners from loosening

499 products

Washers

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

9 products

Insulating Washers

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

20 products

Power Transmission

Disc Springs

Maintain tension and separate components on shafts, under bolt heads, and at the ends of valves

1,680 products

Bearing Lock Washers

Lock bearing nuts in place to prevent loosening due to vibration

103 products