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 5905-01-280-6547
NSN 6650-01-442-7893
NSN 5935-01-469-5865
NSN 6130-01-114-8808
NSN 5965-01-654-4571
NSN 5925-01-378-8171
NSN 5920-00-224-9762
NSN 5950-01-445-1228
NSN 5990-01-485-0260
NSN 5975-00-753-6864
NSN 5975-01-276-9300
NSN 6685-01-417-3310