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 7035-01-327-6130
NSN 6150-00-891-1659
NSN 5930-01-570-2292
NSN 5999-00-221-6559
NSN 6220-00-420-1245
NSN 5985-00-281-0810
NSN 5965-00-222-0282
NSN 5945-00-232-9546
NSN 6130-00-535-4494
NSN 4140-01-459-1184
NSN 5910-01-539-1959
NSN 6110-01-423-9193