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 6105-01-332-4724
NSN 6240-01-181-9565
NSN 7035-01-312-8573
NSN 7035-01-073-0394
NSN 6240-00-555-6347
NSN 6130-01-554-1857
NSN 6685-01-595-4729
NSN 5950-00-587-6099
NSN 2925-01-523-3607
NSN 5975-01-634-0678
NSN 5998-01-323-4010
NSN 6150-01-502-7018