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 6645-01-452-0621
NSN 6130-01-307-0926
NSN 5998-01-527-4867
NSN 5905-01-646-9809
NSN 5990-01-389-1196
NSN 6620-00-405-4621
NSN 6685-01-565-5343
NSN 5998-00-480-3236
NSN 5945-00-189-2435
NSN 6645-01-386-4588
NSN 5990-00-053-1892
NSN 5950-01-332-6387