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 5925-00-481-5571
NSN 5915-00-645-7600
NSN 5960-01-340-4487
NSN 6110-00-432-4417
NSN 5920-00-201-4914
NSN 5925-01-535-1318
NSN 6610-01-078-3242
NSN 5990-00-161-2797
NSN 5998-00-601-6625
NSN 5996-01-088-7074
NSN 6220-01-306-1686
NSN 6685-00-480-9200