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 5999-00-221-4615
NSN 2925-00-441-8252
NSN 5965-01-067-9280
NSN 6685-01-113-6240
NSN 6105-01-537-0105
NSN 6220-00-469-3175
NSN 6220-00-635-8818
NSN 5935-01-344-8217
NSN 5950-00-491-9010
NSN 5965-00-475-2759
NSN 5895-00-988-4416
NSN 6130-00-159-1104