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 4140-00-122-6422
NSN 6150-01-500-2211
NSN 6685-01-503-0314
NSN 6150-00-984-1892
NSN 6135-01-440-9412
NSN 5895-01-542-9157
NSN 5999-01-195-2562
NSN 6135-01-441-0518
NSN 6145-01-406-5594
NSN 7035-01-008-7248
NSN 5950-00-136-9657
NSN 5925-00-887-4241