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 5905-00-555-1899
NSN 5925-01-478-9637
NSN 6105-01-532-7063
NSN 2925-01-330-2988
NSN 6150-01-399-1909
NSN 6150-01-088-0557
NSN 5935-00-100-1147
NSN 6220-00-151-7539
NSN 4140-00-485-6958
NSN 5895-01-484-7047
NSN 6110-01-537-7508
NSN 6135-00-951-3426