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 5910-01-505-4719
NSN 5996-01-641-8935
NSN 5990-01-425-2175
NSN 5998-00-960-8513
NSN 6110-01-436-0210
NSN 6685-00-834-4280
NSN 6320-01-119-3935
NSN 5920-00-529-0618
NSN 5835-01-550-5094
NSN 5985-00-250-6546
NSN 5855-00-879-7245
NSN 6135-00-248-4102