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 6130-01-228-7940
NSN 6620-01-567-4193
NSN 6620-00-891-4658
NSN 6220-00-471-4011
NSN 5996-01-364-1074
NSN 5950-01-145-6214
NSN 5990-00-293-6031
NSN 6220-01-006-3057
NSN 6105-00-794-7479
NSN 6620-00-912-0255
NSN 4140-01-486-7172
NSN 5915-01-299-7843