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 5960-00-450-6353
NSN 5920-00-553-7118
NSN 7035-01-223-9584
NSN 5965-01-396-0021
NSN 6145-01-245-2502
NSN 6220-00-231-2687
NSN 6685-01-027-1168
NSN 6110-01-352-1922
NSN 6130-01-634-0603
NSN 5996-00-205-2933
NSN 5990-00-174-6695
NSN 5975-01-120-8741