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.
Dept. of the Navy 
Spain 
Republic of Korea 
Greece 
Turkey Classification: Copper screws, nuts, bolts, rivets, and other fasteners not threaded
NSN 6145-01-375-7565
NSN 5975-01-194-2521
NSN 5999-01-233-5718
NSN 5965-00-110-3330
NSN 5915-01-589-7247
NSN 6645-01-470-7246
NSN 5996-00-136-6730
NSN 6135-00-767-0331
NSN 5935-00-161-5392
NSN 7035-01-354-4318
NSN 6645-01-469-8778
NSN 6240-01-400-4212