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 5950-00-170-4153
NSN 6105-01-435-5530
NSN 5998-00-252-8380
NSN 5960-01-567-1096
NSN 5895-01-157-2603
NSN 6610-01-593-0135
NSN 5950-00-251-8835
NSN 6645-01-421-2445
NSN 5835-01-359-2575
NSN 6110-00-920-4855
NSN 5835-01-306-5276
NSN 2925-01-504-2650