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 5920-00-109-2062
NSN 5945-01-282-8925
NSN 6135-01-199-1185
NSN 5996-01-538-4658
NSN 5835-00-707-6266
NSN 6320-00-456-0836
NSN 6135-00-557-8874
NSN 5910-00-089-3284
NSN 6650-01-362-3835
NSN 6110-01-391-6497
NSN 6135-00-485-7402
NSN 6620-01-266-5545