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 5950-01-317-2493
NSN 6150-01-657-6001
NSN 6220-00-567-6862
NSN 5895-00-197-2852
NSN 6130-01-441-1746
NSN 5835-01-493-1826
NSN 5925-00-175-9349
NSN 5998-00-876-6949
NSN 6220-00-482-7544
NSN 6610-00-034-3709
NSN 5925-01-353-0006
NSN 5945-00-080-9692