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 5975-00-647-4968
NSN 5905-01-196-6154
NSN 6650-00-170-5095
NSN 5920-01-124-9883
NSN 5905-01-307-7037
NSN 5915-01-221-0363
NSN 5925-01-566-3242
NSN 7035-00-922-5700
NSN 5965-00-728-2960
NSN 4140-00-898-7045
NSN 6650-01-518-8168
NSN 4140-01-474-4275