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 5945-01-307-2493
NSN 5855-00-925-0114
NSN 5915-01-151-4766
NSN 5895-01-139-3579
NSN 6150-01-388-9965
NSN 5930-01-589-0226
NSN 5975-00-528-9774
NSN 5996-01-479-4086
NSN 5950-01-110-2880
NSN 6620-01-462-1625
NSN 4140-01-128-9614
NSN 6620-00-820-9616