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 2925-01-138-3565
NSN 5960-00-111-0457
NSN 5915-01-534-7614
NSN 6150-01-562-8311
NSN 5950-01-603-8625
NSN 6145-01-417-4552
NSN 5975-01-551-1621
NSN 6650-00-238-1199
NSN 5905-00-190-0137
NSN 5960-00-224-6828
NSN 5996-00-581-5810
NSN 6620-01-557-6512