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 5998-01-371-2988
NSN 6110-01-561-1408
NSN 5950-01-608-4489
NSN 5998-01-440-0452
NSN 5935-00-518-2898
NSN 5975-01-227-2389
NSN 6150-01-545-6393
NSN 5920-00-581-3960
NSN 5985-01-094-7286
NSN 6220-01-196-0332
NSN 6130-00-266-7496
NSN 6685-01-559-8474