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 5895-00-719-5864
NSN 5930-00-821-8568
NSN 5999-00-269-5320
NSN 5855-01-413-8962
NSN 2925-01-185-1814
NSN 2925-01-065-0060
NSN 6150-01-194-8883
NSN 6135-00-497-0491
NSN 6130-01-283-9442
NSN 6110-00-146-2114
NSN 5950-01-533-8050
NSN 6220-01-141-4457