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 6685-01-431-5785
NSN 5905-01-391-6619
NSN 5996-01-041-1864
NSN 6610-00-421-9853
NSN 5950-01-542-5493
NSN 5990-00-450-9872
NSN 6220-01-415-0926
NSN 5895-01-403-2793
NSN 4140-00-544-6873
NSN 2925-00-275-1807
NSN 5965-01-204-8505
NSN 5835-01-222-7714