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 
Thailand 
Italy 
Turkey Classification: Copper screws, nuts, bolts, rivets, and other fasteners not threaded
NSN 6220-01-590-0137
NSN 5975-00-405-1938
NSN 5965-01-180-3903
NSN 5999-01-587-7428
NSN 5915-01-211-4934
NSN 6320-00-098-2858
NSN 5950-00-003-5338
NSN 6685-01-303-6493
NSN 5925-01-010-2925
NSN 5990-01-389-1196
NSN 5998-01-275-0936
NSN 5990-01-578-1499