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 5960-00-940-7976
NSN 5999-01-613-4320
NSN 5996-01-630-5243
NSN 5998-01-315-1999
NSN 5960-01-604-1158
NSN 6610-00-704-9754
NSN 5965-00-246-5612
NSN 5920-01-145-6926
NSN 5950-01-393-6062
NSN 4140-01-595-5285
NSN 6130-01-555-8531
NSN 5965-01-535-5789