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 6240-00-168-1474
NSN 5990-01-386-5561
NSN 5950-01-016-3718
NSN 6105-01-394-5305
NSN 5930-01-323-2685
NSN 5935-00-005-2861
NSN 5930-01-119-4133
NSN 5998-01-634-0604
NSN 6320-01-286-7535
NSN 5990-01-600-5989
NSN 5996-00-852-8329
NSN 5985-00-102-4322