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 5930-01-451-4331
NSN 5990-01-278-9985
NSN 5925-01-344-0418
NSN 2925-00-845-1480
NSN 5975-01-437-2518
NSN 5925-01-106-0706
NSN 5999-01-660-2223
NSN 5910-01-502-9833
NSN 6145-00-948-4135
NSN 6150-01-418-1804
NSN 6240-01-424-9997
NSN 5998-01-141-0574