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 5910-01-193-8951
NSN 5905-00-836-8384
NSN 4140-01-406-3292
NSN 6240-00-008-5263
NSN 5998-00-451-4957
NSN 5945-01-591-2499
NSN 2925-00-998-3510
NSN 5910-00-942-1570
NSN 6610-01-313-1473
NSN 6320-01-384-3850
NSN 6320-01-006-6138
NSN 5990-00-757-3486