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 5999-01-074-5219
NSN 5998-01-205-0621
NSN 6145-00-570-0516
NSN 6610-01-387-7517
NSN 6685-01-119-1579
NSN 5996-00-488-7060
NSN 6620-01-475-8696
NSN 6650-01-100-2637
NSN 5910-00-383-1993
NSN 6105-00-540-5616
NSN 4140-01-284-0217
NSN 6135-00-044-3860