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 4140-01-439-2097
NSN 6135-00-269-5843
NSN 6105-00-169-8773
NSN 5985-01-606-9422
NSN 6220-01-152-1701
NSN 5950-00-996-0180
NSN 6645-01-005-5915
NSN 5975-01-439-7203
NSN 5930-00-752-4599
NSN 5915-00-838-0723
NSN 5985-01-389-6534
NSN 5895-00-574-0287