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 5915-00-584-3512
NSN 2925-00-311-0825
NSN 6610-01-383-6982
NSN 6135-01-339-8064
NSN 6240-01-285-7616
NSN 6150-01-288-8792
NSN 6135-00-191-6444
NSN 5945-00-660-6234
NSN 5960-01-614-8005
NSN 5905-01-239-6825
NSN 5950-00-201-7921
NSN 4140-01-623-6426