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 6240-00-774-9302
NSN 5950-01-233-5882
NSN 5930-01-457-5245
NSN 4140-01-139-4041
NSN 5910-00-546-9279
NSN 7035-01-183-1989
NSN 5998-01-434-1912
NSN 5855-01-369-4192
NSN 2925-01-004-5627
NSN 4140-00-144-6833
NSN 4140-00-951-3093
NSN 6650-01-048-3791