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 5930-01-468-9512
NSN 6685-00-890-8410
NSN 5965-01-124-8772
NSN 6620-00-410-0331
NSN 6610-01-303-1674
NSN 5998-00-625-9196
NSN 6110-01-195-6695
NSN 5930-01-416-1481
NSN 6240-01-561-7213
NSN 4140-01-054-2279
NSN 6110-01-519-3127
NSN 5925-00-275-7599