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 6620-01-508-6072
NSN 6145-01-140-1538
NSN 5990-01-652-7373
NSN 6240-01-298-9911
NSN 6685-01-616-0001
NSN 6150-00-931-0887
NSN 6220-00-379-4044
NSN 6135-00-078-9931
NSN 5935-01-327-8163
NSN 6135-01-071-4923
NSN 5930-00-446-2013
NSN 6610-01-503-2254