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 
Brazil 
Spain 
Singapore 
Belgium 
Canada 
France 
Portugal 
Greece 
Turkey Classification: Copper screws, nuts, bolts, rivets, and other fasteners not threaded
NSN 5920-01-167-5029
NSN 5925-01-200-7813
NSN 6105-01-546-6443
NSN 6105-00-321-9534
NSN 5996-01-151-2452
NSN 5920-01-541-9375
NSN 7035-01-057-6325
NSN 5855-01-375-2152
NSN 5998-00-186-8583
NSN 6610-01-412-5776
NSN 6135-01-180-9611
NSN 5945-01-062-8099