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 6145-01-389-7220
NSN 6105-01-142-6179
NSN 4140-00-808-9759
NSN 5965-00-081-9412
NSN 6240-01-107-5553
NSN 5935-01-141-7694
NSN 5998-01-361-8938
NSN 6105-01-235-7448
NSN 5985-01-138-8997
NSN 5935-01-384-0698
NSN 6145-01-564-4932
NSN 5996-01-444-1488