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 
Spain 
Republic of Korea 
Greece 
Turkey Classification: Copper screws, nuts, bolts, rivets, and other fasteners not threaded
NSN 6645-01-305-9135
NSN 5920-01-010-1578
NSN 6645-00-246-4934
NSN 6610-01-174-0708
NSN 6110-01-525-0451
NSN 6110-00-736-9946
NSN 6145-00-130-8078
NSN 5905-01-295-2196
NSN 6105-01-229-6491
NSN 5975-00-525-2331
NSN 2925-01-345-9439
NSN 2925-01-150-7160