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 6145-00-730-3933
NSN 5905-00-771-0870
NSN 4140-01-273-4891
NSN 5999-01-076-3688
NSN 5915-01-279-8155
NSN 5996-00-373-9001
NSN 5925-00-348-3591
NSN 5895-00-690-4507
NSN 5915-01-560-6795
NSN 5935-00-003-5325
NSN 6110-01-171-9752
NSN 5999-00-134-0729