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 4140-01-483-6234
NSN 5999-01-341-2363
NSN 5965-01-601-8507
NSN 5960-00-420-0418
NSN 5996-01-179-2681
NSN 4140-01-562-3619
NSN 5855-01-087-1417
NSN 5905-01-436-3950
NSN 6220-00-171-8638
NSN 5910-01-138-5504
NSN 5915-01-268-2832
NSN 2925-01-250-2731