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 5895-01-192-8590
NSN 5895-01-158-6002
NSN 5855-01-536-3532
NSN 6110-00-399-1413
NSN 6110-01-327-3001
NSN 5998-00-988-9270
NSN 6130-01-485-2464
NSN 6620-01-434-3675
NSN 5945-01-157-7683
NSN 6150-00-580-0511
NSN 5905-01-541-2939
NSN 5965-00-001-7593