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 6320-01-438-6280
NSN 5945-01-593-6251
NSN 2925-00-833-9466
NSN 5925-00-343-6747
NSN 5935-01-658-4633
NSN 5950-01-247-6501
NSN 5985-01-284-6980
NSN 5975-00-293-8166
NSN 6650-00-004-3683
NSN 5985-01-501-2852
NSN 5950-01-159-9504
NSN 6320-00-115-8800