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 6650-00-196-0637
NSN 5925-01-424-8343
NSN 4140-01-412-1566
NSN 6685-01-447-2226
NSN 6110-01-269-4159
NSN 6145-01-373-0471
NSN 5905-01-134-8717
NSN 5895-00-841-1745
NSN 6610-00-264-0961
NSN 5999-01-519-2998
NSN 5945-00-642-5755
NSN 6685-01-649-8166