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 6620-00-115-9050
NSN 5999-00-587-9709
NSN 5998-01-535-7623
NSN 6130-01-553-7519
NSN 5855-00-138-2386
NSN 5925-00-140-6367
NSN 6130-00-267-9970
NSN 5975-01-048-3036
NSN 5985-01-152-5851
NSN 6645-00-137-7699
NSN 6620-00-816-9755
NSN 6135-00-269-5843