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 5975-01-521-9945
NSN 2925-01-139-7098
NSN 6130-01-534-9112
NSN 6105-01-479-0060
NSN 6610-00-617-6056
NSN 6135-00-025-6382
NSN 6130-01-188-2169
NSN 5920-00-499-8285
NSN 5990-01-310-5630
NSN 5990-00-422-2093
NSN 6610-00-386-4745
NSN 5835-00-711-3371