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 6105-01-433-0535
NSN 5960-01-063-6846
NSN 5965-00-079-2360
NSN 5855-01-518-5278
NSN 5935-01-054-4316
NSN 5930-01-008-1486
NSN 5835-01-629-2044
NSN 6610-01-509-0017
NSN 6645-01-487-6282
NSN 2925-00-953-2920
NSN 5895-01-222-7259
NSN 6135-01-180-9611