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 4140-01-494-3714
NSN 7035-01-507-7309
NSN 6220-01-154-9654
NSN 5998-00-006-0495
NSN 6610-01-609-7776
NSN 6650-01-211-5579
NSN 5895-01-431-9365
NSN 5960-01-589-6846
NSN 5910-00-709-3233
NSN 5925-01-444-0929
NSN 6610-01-384-7949
NSN 6145-01-123-7019