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 6685-00-066-6102
NSN 6110-01-302-2615
NSN 6150-01-351-6724
NSN 6145-00-781-6998
NSN 5999-01-291-3698
NSN 6220-01-513-9279
NSN 5920-01-583-9736
NSN 5905-00-488-8384
NSN 2925-01-374-2402
NSN 5925-01-147-6954
NSN 4140-00-977-2489
NSN 5910-00-938-7227