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 6135-01-461-2915
NSN 5910-01-441-3690
NSN 5999-01-510-4745
NSN 5835-01-461-8184
NSN 5975-01-226-3583
NSN 6320-01-415-0953
NSN 5985-01-472-6637
NSN 6145-01-227-8720
NSN 4140-01-079-3584
NSN 6685-01-129-7472
NSN 5895-01-382-8643
NSN 6135-00-962-4111