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 5855-01-159-1654
NSN 5855-01-279-5316
NSN 5996-00-925-1953
NSN 5920-01-449-1534
NSN 5960-01-491-9916
NSN 5950-01-478-6049
NSN 5950-00-961-8592
NSN 4140-01-268-2898
NSN 6220-01-396-0322
NSN 5920-01-259-1014
NSN 6685-01-477-3890
NSN 5985-01-459-8441