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 5935-01-199-8210
NSN 6150-01-658-8726
NSN 5920-01-453-2109
NSN 6135-00-756-6149
NSN 6150-00-758-1530
NSN 7035-01-224-5165
NSN 4140-01-437-7760
NSN 5930-01-603-3572
NSN 5855-01-534-6802
NSN 5925-00-921-1171
NSN 6130-01-498-4932
NSN 6145-01-341-2712