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 6220-01-506-8787
NSN 6135-00-567-1322
NSN 5975-01-025-1870
NSN 5910-01-258-4887
NSN 6220-01-305-7210
NSN 2925-00-391-0331
NSN 2925-00-243-6841
NSN 5998-00-113-3045
NSN 5960-01-536-9763
NSN 5915-01-234-9982
NSN 6105-01-426-7906
NSN 6145-01-510-3352