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 5960-01-250-5502
NSN 2925-00-590-3450
NSN 6650-01-292-7749
NSN 6610-00-005-4452
NSN 5999-01-212-0682
NSN 5925-00-912-2774
NSN 2925-00-109-4694
NSN 5930-01-028-7131
NSN 6105-01-312-4218
NSN 5945-01-494-6818
NSN 4140-00-918-5162
NSN 6645-01-258-5558