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 6105-00-969-4644
NSN 5985-00-425-3720
NSN 5965-01-007-1963
NSN 6150-01-475-2094
NSN 6135-01-508-3784
NSN 6145-00-978-8056
NSN 6320-01-648-5538
NSN 7035-00-205-1932
NSN 5855-00-688-9954
NSN 5960-01-536-9763
NSN 5855-00-466-2309
NSN 5920-00-741-5418