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 5965-01-629-0975
NSN 6145-01-577-2077
NSN 7035-01-649-8977
NSN 6645-01-256-6376
NSN 5910-01-421-3340
NSN 6610-01-424-1529
NSN 4140-00-811-2297
NSN 5996-01-112-6542
NSN 5965-00-501-7835
NSN 4140-01-523-1944
NSN 6220-01-605-1346
NSN 5925-01-029-3483