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 5915-01-578-2263
NSN 6240-00-727-8573
NSN 5945-01-423-7776
NSN 6685-01-243-1265
NSN 5925-01-206-5484
NSN 5985-01-615-6255
NSN 5935-01-260-5300
NSN 5945-00-452-1294
NSN 6105-00-927-1474
NSN 5945-01-202-8363
NSN 5998-00-058-5956
NSN 2925-00-465-6354