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 5920-01-464-3105
NSN 5945-01-237-2592
NSN 7035-01-554-2766
NSN 2925-00-964-7128
NSN 5925-01-431-7057
NSN 5910-00-820-2721
NSN 4140-01-103-3377
NSN 6150-00-383-4377
NSN 6135-01-300-8455
NSN 6320-00-701-0437
NSN 6650-01-338-6042
NSN 5965-00-249-6980