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 6150-00-349-4790
NSN 6110-01-602-9830
NSN 6220-01-116-2411
NSN 6320-00-857-4073
NSN 6610-01-170-2905
NSN 5950-01-017-1217
NSN 5895-01-018-8722
NSN 6620-01-451-8989
NSN 6145-00-846-8173
NSN 5998-01-092-4956
NSN 2925-00-185-1618
NSN 5905-00-691-5857