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 5998-00-630-2338
NSN 6620-01-233-2583
NSN 5930-01-587-2108
NSN 7035-01-042-0527
NSN 6135-01-168-2944
NSN 5975-00-331-8200
NSN 6645-00-991-8704
NSN 6610-00-598-5268
NSN 5935-00-169-5892
NSN 6105-01-522-0699
NSN 5855-01-030-8601
NSN 4140-01-322-1179