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 5835-01-384-3206
NSN 6610-00-480-6633
NSN 6130-01-653-1229
NSN 6645-00-799-9459
NSN 5990-01-117-7932
NSN 5930-00-605-2853
NSN 5999-01-254-4387
NSN 6110-01-361-4960
NSN 5950-01-068-1356
NSN 5835-00-155-1379
NSN 6240-00-646-6931
NSN 5930-01-139-3773