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 6650-00-313-4172
NSN 5950-01-661-1224
NSN 6620-01-472-6461
NSN 6135-00-992-8750
NSN 5925-01-350-5553
NSN 6105-01-032-5168
NSN 6650-01-546-7632
NSN 6145-00-233-5821
NSN 6135-01-443-4484
NSN 6135-00-985-7887
NSN 6110-01-429-7851
NSN 5999-00-633-7592