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 6110-01-134-6550
NSN 6220-01-370-3302
NSN 5935-01-508-6414
NSN 6130-01-544-7601
NSN 5855-01-299-8637
NSN 6105-01-211-1101
NSN 6685-01-541-2140
NSN 5965-00-647-3972
NSN 6220-01-398-1087
NSN 5960-01-599-9821
NSN 5925-01-457-5668
NSN 5935-01-444-3573