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 6105-01-525-0247
NSN 6610-01-158-2988
NSN 5835-01-013-8797
NSN 5975-01-424-4639
NSN 5905-00-545-5996
NSN 4140-00-147-8971
NSN 6145-01-520-4934
NSN 6145-01-062-6918
NSN 7035-01-457-5645
NSN 5895-00-607-9831
NSN 6145-00-146-2932
NSN 7035-01-451-1618