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 6240-00-006-3725
NSN 5965-01-337-1217
NSN 5920-01-583-2134
NSN 5925-00-246-0582
NSN 4140-00-585-7763
NSN 5998-01-531-2500
NSN 5990-01-485-0260
NSN 5835-01-473-6187
NSN 5950-01-194-4267
NSN 5998-00-740-7515
NSN 5915-01-065-0413