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 5920-00-069-3039
NSN 5930-01-411-8827
NSN 5935-00-419-0121
NSN 6135-00-255-1340
NSN 5965-01-289-6436
NSN 5950-00-950-5627
NSN 5950-01-634-0677
NSN 5915-00-067-7464
NSN 6240-00-364-0850
NSN 5960-00-894-1190
NSN 6105-01-512-1831
NSN 4140-00-450-4484