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 6320-01-134-7267
NSN 5935-01-027-0915
NSN 5950-01-085-5632
NSN 5925-01-419-0832
NSN 6320-01-481-7322
NSN 7035-01-266-3490
NSN 4140-01-248-4610
NSN 5950-01-629-8862
NSN 4140-00-521-0380
NSN 5910-00-282-2531
NSN 5985-01-555-8057
NSN 5975-01-401-5355