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 6240-00-340-6977
NSN 6220-01-551-0833
NSN 6685-00-688-5154
NSN 6150-01-056-5288
NSN 6130-00-205-1714
NSN 6150-01-029-9756
NSN 7035-01-161-9878
NSN 5965-00-324-2428
NSN 5915-01-014-9763
NSN 6220-00-800-4498
NSN 5985-00-888-1468
NSN 6610-01-431-6867