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 6150-00-186-2918
NSN 6240-00-344-8582
NSN 5855-01-610-3506
NSN 5930-01-214-6353
NSN 5895-01-492-6233
NSN 2925-01-394-9658
NSN 5835-00-009-2862
NSN 5855-00-688-9954
NSN 5965-00-350-2367
NSN 6645-01-633-1852
NSN 6150-00-913-4917
NSN 6110-01-423-2960