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 6610-01-027-1641
NSN 5935-00-215-8672
NSN 6610-01-130-5101
NSN 6645-01-595-7659
NSN 5855-01-396-0258
NSN 5999-01-544-2051
NSN 6150-00-868-1860
NSN 5960-01-224-7151
NSN 6645-01-609-7365
NSN 6620-01-052-2773
NSN 5930-01-149-2979
NSN 6220-00-081-6429