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 5960-01-352-0451
NSN 5999-01-472-2536
NSN 5935-01-417-9285
NSN 6145-00-257-6820
NSN 5996-01-418-0677
NSN 6135-00-990-1822
NSN 6150-00-462-0159
NSN 5965-01-106-4969
NSN 6620-01-175-0789
NSN 6145-00-020-6708
NSN 6320-01-585-8468
NSN 5975-01-559-4095