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 2925-01-316-0725
NSN 6320-01-345-5818
NSN 5910-00-557-6997
NSN 5895-00-844-2954
NSN 4140-01-569-6113
NSN 5945-01-500-2140
NSN 5999-01-053-6295
NSN 5910-00-079-0375
NSN 5925-01-106-3641
NSN 5920-01-234-1593
NSN 5855-01-539-4296
NSN 6645-00-451-6462