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 5915-01-508-1111
NSN 5835-01-454-5267
NSN 5996-00-496-8806
NSN 5975-01-388-2153
NSN 6130-01-207-0755
NSN 6320-00-790-4844
NSN 5996-00-876-6631
NSN 7035-01-406-4146
NSN 6685-00-688-5154
NSN 6145-00-901-1598
NSN 6685-01-557-7742
NSN 5975-00-565-1071