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 5985-01-146-4877
NSN 5985-00-271-9502
NSN 5996-00-011-3851
NSN 6110-01-563-1337
NSN 5895-01-461-0010
NSN 6220-00-175-7849
NSN 6650-01-060-1089
NSN 5950-01-344-7900
NSN 5925-01-575-5233
NSN 6240-00-130-5643
NSN 6320-01-425-1417
NSN 6650-01-200-7657