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 5895-01-163-4231
NSN 5895-00-837-3441
NSN 5925-00-090-7403
NSN 5975-01-086-6222
NSN 5945-01-576-8492
NSN 5996-01-426-6713
NSN 5905-01-069-3893
NSN 5930-01-332-0682
NSN 6320-00-238-9973
NSN 5835-01-424-0054
NSN 5985-01-478-8103
NSN 5910-01-467-9918