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 6645-00-664-4665
NSN 6150-01-606-9869
NSN 5998-01-012-2593
NSN 5905-00-156-1627
NSN 5895-01-109-4944
NSN 5855-01-583-3214
NSN 6145-01-395-6636
NSN 5910-01-576-8402
NSN 5975-01-629-6898
NSN 6240-01-129-7060
NSN 5855-00-610-4052
NSN 6610-01-265-1824