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 6130-01-442-7044
NSN 4140-01-212-3113
NSN 6320-01-123-2476
NSN 5925-01-327-2731
NSN 6110-01-456-1985
NSN 6130-01-592-4340
NSN 5930-00-820-9799
NSN 5925-01-281-3041
NSN 6150-00-222-5302
NSN 5999-01-165-3198
NSN 5935-01-571-2190
NSN 5985-01-178-2652