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 6150-00-317-2003
NSN 5945-01-468-0837
NSN 5960-00-081-9255
NSN 5855-01-461-8169
NSN 5999-00-117-4567
NSN 7035-01-467-8921
NSN 2925-00-474-4990
NSN 5999-00-785-3308
NSN 5960-01-552-0862
NSN 5855-01-429-8702
NSN 5950-01-051-0124
NSN 6650-01-630-2223