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 5985-01-133-7653
NSN 4140-01-460-5968
NSN 6610-00-179-5254
NSN 5925-01-071-5404
NSN 5920-01-387-3903
NSN 5905-01-197-7352
NSN 6145-01-480-1461
NSN 6105-01-488-7923
NSN 6145-01-093-8603
NSN 5835-01-158-6878
NSN 6685-00-099-9025
NSN 2925-01-472-4423