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 5975-00-050-3729
NSN 6150-01-463-8659
NSN 6150-00-251-7608
NSN 5965-00-156-8562
NSN 6110-01-410-7637
NSN 6135-01-046-6803
NSN 6220-01-443-3637
NSN 5855-01-656-6808
NSN 7035-01-432-2424
NSN 5975-00-099-9312
NSN 4140-01-012-2460
NSN 4140-00-035-4997