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 5990-01-572-3137
NSN 6610-01-418-5787
NSN 6240-01-502-7103
NSN 5945-01-196-6948
NSN 6135-01-462-1135
NSN 5920-01-634-0250
NSN 5985-01-504-5806
NSN 5985-01-455-5747
NSN 2925-00-526-4541
NSN 5960-01-641-5493
NSN 7035-00-523-7492
NSN 5935-00-177-2761