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 4140-01-206-4430
NSN 5998-00-096-1063
NSN 5935-01-461-2166
NSN 6645-00-522-4173
NSN 5998-01-631-5884
NSN 5905-00-287-7791
NSN 6150-01-573-1537
NSN 6320-01-123-2476
NSN 6320-01-564-0893
NSN 5935-01-269-1127
NSN 6135-00-950-2669
NSN 5960-01-443-3067