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 5930-01-186-1310
NSN 5950-01-406-2435
NSN 6620-00-557-7008
NSN 5998-00-761-2947
NSN 5895-01-416-6243
NSN 6130-01-087-2843
NSN 5935-01-062-0705
NSN 6110-01-317-3669
NSN 5930-00-699-9439
NSN 7035-01-390-1132
NSN 6130-00-986-7412
NSN 6135-01-591-7139