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 
Thailand 
Italy 
Turkey Classification: Copper screws, nuts, bolts, rivets, and other fasteners not threaded
NSN 6620-01-389-3324
NSN 5895-01-384-0418
NSN 5960-00-483-0161
NSN 5925-00-160-4747
NSN 5855-01-464-5084
NSN 6110-01-594-7185
NSN 6240-01-174-1907
NSN 6610-00-518-4919
NSN 6110-00-242-2498
NSN 6150-01-147-6177
NSN 5920-01-554-4832
NSN 2925-01-231-6312