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 6135-01-375-2021
NSN 6145-01-024-9211
NSN 5905-00-964-4917
NSN 6150-01-589-3856
NSN 5905-00-367-6164
NSN 6610-01-101-5909
NSN 5835-01-268-1924
NSN 5935-01-100-5484
NSN 5920-01-099-0539
NSN 5975-01-577-4465
NSN 4140-01-396-9342
NSN 6105-01-602-2246