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 5855-00-481-0019
NSN 5999-00-009-1609
NSN 6130-01-307-8886
NSN 6220-01-435-6297
NSN 6610-01-358-1161
NSN 5855-01-656-0831
NSN 5935-00-126-5937
NSN 6620-01-071-5549
NSN 5965-01-465-4370
NSN 5935-00-670-4043
NSN 5835-00-275-0584
NSN 5965-01-525-7513