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 6320-00-790-4844
NSN 6320-01-521-1764
NSN 6240-01-364-6022
NSN 5999-00-903-7974
NSN 6620-01-483-5247
NSN 5998-01-294-0053
NSN 5975-01-373-0514
NSN 5950-01-056-9478
NSN 5910-01-206-5051
NSN 6240-01-441-0784
NSN 6105-01-352-5788
NSN 4140-00-279-0515