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 6150-00-442-0298
NSN 6240-01-257-1861
NSN 5930-00-011-5255
NSN 5950-01-338-2048
NSN 2925-01-579-1010
NSN 6620-00-208-5447
NSN 6105-00-371-1734
NSN 5905-01-163-7921
NSN 5950-01-545-2908
NSN 5990-01-041-8008
NSN 5965-01-293-0121
NSN 5999-01-376-4711