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 5925-01-254-6591
NSN 5945-01-196-0827
NSN 6610-01-601-3944
NSN 5975-01-228-1239
NSN 5960-00-181-0640
NSN 2925-01-444-2061
NSN 5996-01-055-6847
NSN 2925-00-010-9609
NSN 5855-01-278-8922
NSN 6110-01-642-2377
NSN 2925-01-540-7389
NSN 6110-01-611-6886