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 5910-01-440-7916
NSN 6645-01-076-3494
NSN 6685-00-318-7766
NSN 5930-00-468-8320
NSN 5950-01-202-2768
NSN 6610-01-411-6800
NSN 5930-01-310-8565
NSN 5998-01-024-2117
NSN 5999-00-091-9514
NSN 6620-00-493-9454
NSN 6145-01-591-0083
NSN 6135-00-866-2311