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 5965-01-216-8217
NSN 6130-01-017-1447
NSN 5935-00-678-8596
NSN 5925-00-335-8727
NSN 5965-01-647-4195
NSN 4140-01-074-2588
NSN 5950-00-584-4490
NSN 6130-01-559-4133
NSN 5855-01-616-0762
NSN 2925-01-474-3363
NSN 5910-00-020-3401
NSN 5998-00-138-9261