A circular-shaped item designed to maintain predetermined distance between assembled parts and/or for distributing pressure or preventing endwise movement between member parts. It has a solid cross-section and two flat parallel bearing surfaces. The distance between the bearing surfaces perpendicular to the axis of the centrally located hole shall not exceed 25 percent of the outside diameter. The diameter of the centrally located hole must exceed 75 percent of the outside diameter. Excludes laminated items. For items manufactured from impregnated graphite or lubricated nonmetallic materials, excluding felt or plastics, see gasket. For items manufactured from lubricated plastics, see bearing, washer, thrust. For items manufactured from lubricated felt, see felt, mechanical, preformed. Excludes disk, valve; insulator washer; and shim. See also spacer, plate and spacer, sleeve.
Classification: Copper screws, nuts, bolts, rivets, and other fasteners not threaded
NSN 5925-01-310-1312
NSN 5998-01-070-2806
NSN 6145-00-548-7195
NSN 6105-01-455-3300
NSN 5930-01-538-1706
NSN 5930-00-027-8428
NSN 4140-01-444-1033
NSN 6610-01-273-9317
NSN 5895-01-022-2819
NSN 6645-01-257-1948
NSN 5998-00-153-9989
NSN 6110-00-138-8687