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 6645-01-471-4960
NSN 5930-01-548-1479
NSN 6110-01-428-3769
NSN 5996-01-511-0458
NSN 5950-01-519-2709
NSN 5950-01-513-9108
NSN 6130-01-561-0770
NSN 6240-01-367-3656
NSN 4140-01-500-8094
NSN 6105-01-509-9544
NSN 6650-01-144-8436
NSN 6620-00-905-6590