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 6135-00-452-2266
NSN 6135-01-222-0703
NSN 5985-01-517-5486
NSN 5855-01-364-1005
NSN 6650-01-555-9348
NSN 5985-01-055-8556
NSN 5930-00-395-2184
NSN 6240-01-443-7154
NSN 5930-01-519-9318
NSN 6645-00-050-3738
NSN 4140-01-537-6965
NSN 6620-01-302-1537