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 5950-01-381-1361
NSN 6620-00-635-7347
NSN 5950-00-518-1819
NSN 6620-00-816-8240
NSN 5920-01-558-8483
NSN 4140-01-382-8506
NSN 6105-00-958-7328
NSN 5930-01-026-0597
NSN 5996-00-299-1609
NSN 7035-00-417-2967
NSN 5915-01-114-5065
NSN 6685-01-264-8769