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 6650-01-180-2173
NSN 5990-00-296-4825
NSN 4140-00-786-3237
NSN 6220-01-147-4500
NSN 5920-01-525-7688
NSN 5990-01-516-9665
NSN 5920-00-578-9956
NSN 2925-01-103-7019
NSN 5930-01-004-2103
NSN 6240-01-172-9897
NSN 6620-00-621-6951
NSN 6650-01-561-7761