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 2925-01-583-5619
NSN 4140-01-261-2966
NSN 6145-00-705-6686
NSN 5985-01-438-1720
NSN 6150-01-263-6789
NSN 5950-01-373-5297
NSN 6685-01-157-1288
NSN 6620-01-044-3371
NSN 6130-01-190-3332
NSN 5895-00-578-1411
NSN 5990-01-439-4643
NSN 5930-01-397-7630