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 6620-00-366-1365
NSN 5998-01-393-5742
NSN 5925-01-399-0613
NSN 4140-00-674-2856
NSN 5975-00-880-8589
NSN 5915-01-533-9982
NSN 6650-01-570-8984
NSN 6620-01-354-2824
NSN 6320-01-409-1388
NSN 6610-01-056-1335
NSN 5985-01-422-2552
NSN 5855-01-236-9645