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 6320-01-302-5157
NSN 5895-00-566-3396
NSN 5835-01-089-1076
NSN 5855-00-879-7245
NSN 5990-00-814-6923
NSN 4140-01-188-2754
NSN 6620-01-197-7083
NSN 5935-01-542-8529
NSN 5910-00-763-2448
NSN 6610-01-180-5034
NSN 6320-01-214-8621
NSN 5905-01-660-2846