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 6610-01-033-2402
NSN 4140-00-226-9807
NSN 6105-01-423-8242
NSN 5996-01-552-7108
NSN 2925-01-456-6840
NSN 5996-00-191-2133
NSN 6685-01-119-9213
NSN 5950-01-574-4641
NSN 5920-01-328-5310
NSN 5910-01-262-2938
NSN 2925-01-381-5307
NSN 6220-01-551-8277