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 6620-00-058-5225
NSN 6135-01-570-4284
NSN 5935-01-451-6503
NSN 7035-00-009-8705
NSN 5960-00-249-5005
NSN 4140-01-179-4507
NSN 5905-01-364-0737
NSN 4140-00-542-4611
NSN 6650-00-710-8130
NSN 5985-01-358-5681
NSN 5905-00-512-4228
NSN 6645-00-472-2468