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 5835-01-193-6192
NSN 5965-00-424-9636
NSN 6645-01-125-3935
NSN 6650-01-304-1739
NSN 5945-01-202-6177
NSN 6320-01-489-6044
NSN 7035-00-088-7355
NSN 6150-00-295-5714
NSN 5945-01-214-6437
NSN 6130-01-014-5419
NSN 2925-01-253-6006
NSN 6320-01-296-3181