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 6220-00-160-9372
NSN 5985-01-646-5185
NSN 7035-01-321-1555
NSN 6320-01-607-1491
NSN 5996-01-568-8826
NSN 5990-00-212-4316
NSN 5910-00-492-7782
NSN 5895-01-408-8833
NSN 6620-01-316-7907
NSN 5998-01-463-9396
NSN 5930-01-477-2113
NSN 6110-01-605-9839