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 4140-01-205-1100
NSN 5998-00-205-2765
NSN 6685-01-191-1539
NSN 5960-01-031-7992
NSN 2925-01-019-1672
NSN 5965-01-420-2629
NSN 6150-00-360-1508
NSN 6240-01-615-1247
NSN 7035-01-242-6496
NSN 5965-00-247-4886
NSN 5930-00-008-5221
NSN 5855-01-586-2986