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 5855-01-138-4985
NSN 6135-01-648-4875
NSN 6610-01-280-3429
NSN 6145-01-536-6484
NSN 6320-00-110-8005
NSN 5915-00-140-0462
NSN 5935-00-333-1363
NSN 5930-01-200-8347
NSN 5999-01-357-6399
NSN 6645-00-368-8636
NSN 5960-00-171-9575
NSN 5965-01-095-9767