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 6650-00-525-3446
NSN 5975-00-952-1791
NSN 5905-01-364-8594
NSN 2925-01-032-3814
NSN 5835-01-327-0770
NSN 6220-00-211-3985
NSN 6220-01-570-1647
NSN 5999-01-231-3300
NSN 6105-00-417-3305
NSN 6135-00-951-3426
NSN 6645-00-166-7926
NSN 5930-01-132-1748