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 5990-00-159-1774
NSN 6145-01-650-1199
NSN 6220-01-345-4865
NSN 6105-01-443-2980
NSN 5835-00-289-9080
NSN 6620-01-478-9667
NSN 5990-00-050-4369
NSN 5935-00-195-5598
NSN 5905-00-962-0538
NSN 5960-00-946-2760
NSN 6240-01-365-7996
NSN 5960-01-170-4057