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 5905-00-771-0870
NSN 5895-00-216-5849
NSN 5950-01-473-9352
NSN 5960-00-245-2645
NSN 6685-01-201-6654
NSN 6650-01-027-1181
NSN 6135-01-375-6724
NSN 6320-01-322-8340
NSN 6105-00-079-6436
NSN 5920-00-835-0615
NSN 5975-00-660-6652
NSN 5965-00-929-9415