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.
Classification: Copper screws, nuts, bolts, rivets, and other fasteners not threaded
NSN 5990-00-967-6267
NSN 5915-00-681-6299
NSN 6610-00-066-9353
NSN 6620-00-424-4335
NSN 6130-01-477-0569
NSN 5835-01-227-2318
NSN 6105-01-216-1617
NSN 5910-01-433-8765
NSN 7035-01-605-6368
NSN 5915-01-633-9845
NSN 5910-01-096-3434
NSN 5998-00-179-3958