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 6620-00-452-5738
NSN 2925-00-555-8836
NSN 2925-01-236-3547
NSN 5996-00-518-0460
NSN 5915-01-458-2178
NSN 4140-01-069-2307
NSN 5905-00-195-7636
NSN 5915-01-633-9845
NSN 7035-01-202-9250
NSN 6240-01-217-0432
NSN 4140-01-370-4075
NSN 7035-01-118-5861