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 5920-01-130-8411
NSN 6685-01-520-3246
NSN 5998-00-985-4372
NSN 5920-01-183-6329
NSN 5930-00-839-6676
NSN 6620-00-542-1579
NSN 5950-00-435-1979
NSN 6645-00-067-7070
NSN 6135-01-252-0315
NSN 5965-00-241-6424
NSN 6150-01-112-0540
NSN 6610-01-339-1595