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 5975-00-451-4427
NSN 6320-00-790-4844
NSN 5950-01-613-2892
NSN 5910-00-300-4988
NSN 5990-00-780-8915
NSN 6610-00-466-2486
NSN 5855-01-456-8667
NSN 6145-01-425-6260
NSN 5930-00-482-7192
NSN 6650-01-112-0453
NSN 5945-00-881-4772
NSN 5925-01-265-7749