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 5930-01-523-0239
NSN 6610-00-661-1797
NSN 7035-01-462-5766
NSN 5999-00-432-6692
NSN 6240-01-574-9304
NSN 5965-01-141-6485
NSN 5835-01-250-2939
NSN 6650-01-284-6536
NSN 5975-00-165-3432
NSN 5990-01-583-2870
NSN 6145-01-364-9896
NSN 6610-01-424-9721