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 6145-00-633-5159
NSN 6610-00-657-0363
NSN 6150-01-186-3973
NSN 5996-01-344-2160
NSN 5930-01-230-0721
NSN 5855-01-499-4139
NSN 4140-00-005-1783
NSN 5945-00-161-4014
NSN 5945-00-517-6224
NSN 6610-00-248-1559
NSN 6110-00-185-8147
NSN 6130-00-162-9958