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 6645-00-256-4072
NSN 6220-01-265-8650
NSN 5985-00-666-0207
NSN 5975-01-362-3266
NSN 5998-00-688-6972
NSN 6220-01-104-0624
NSN 7035-00-753-0695
NSN 4140-00-107-8212
NSN 5985-01-227-0465
NSN 5895-00-781-8636
NSN 5950-01-013-9382
NSN 2925-00-899-4261