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 6320-01-136-8505
NSN 5895-00-278-8092
NSN 6220-01-590-7272
NSN 5950-01-125-7455
NSN 5925-01-525-7694
NSN 6650-01-048-6757
NSN 5855-01-386-7323
NSN 6610-01-633-8931
NSN 5950-01-218-4859
NSN 6650-01-459-7155
NSN 6150-01-381-8806
NSN 6150-01-483-1595