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 6685-00-296-0392
NSN 5930-00-610-7620
NSN 6110-01-490-2349
NSN 5960-01-411-5899
NSN 6685-01-510-4717
NSN 5999-01-350-3648
NSN 6620-00-787-6683
NSN 5895-01-021-3598
NSN 6135-01-056-4609
NSN 5910-01-198-8303
NSN 5945-01-385-4660
NSN 6620-01-401-5356