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 5930-01-081-6431
NSN 6150-00-391-8856
NSN 6110-01-374-4086
NSN 5985-01-277-2867
NSN 6240-00-103-0058
NSN 6130-01-160-0227
NSN 6220-01-556-8043
NSN 5999-01-119-9646
NSN 5930-01-595-5837
NSN 6105-01-422-6234
NSN 5996-01-141-6916
NSN 5999-00-888-6932