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 5930-01-094-4425
NSN 5925-01-367-2519
NSN 6620-00-245-6164
NSN 6110-01-617-7948
NSN 5915-01-031-0240
NSN 4140-01-160-8106
NSN 5950-01-201-9148
NSN 6135-01-384-7155
NSN 6645-01-394-1923
NSN 5990-00-682-3531
NSN 5945-00-939-2297
NSN 5910-00-170-8271