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 5950-00-419-3989
NSN 5975-00-582-1460
NSN 5935-01-299-1457
NSN 6130-00-102-4521
NSN 2925-01-385-6661
NSN 6145-01-487-6936
NSN 6685-01-290-2935
NSN 5855-00-014-5008
NSN 6220-01-253-6684
NSN 5975-01-160-8617
NSN 5960-01-433-7565
NSN 4140-01-317-3559