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 6135-01-359-4293
NSN 4140-00-204-3563
NSN 6685-01-487-0173
NSN 5998-00-446-4109
NSN 6110-01-565-8068
NSN 7035-00-703-3535
NSN 6150-01-500-1302
NSN 5855-01-147-6024
NSN 6110-01-522-0703
NSN 5920-01-387-9972
NSN 5925-00-311-2341
NSN 4140-00-102-8607