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 5998-01-171-1795
NSN 5855-01-538-9436
NSN 6145-00-937-3536
NSN 6150-01-009-2040
NSN 5965-01-521-9229
NSN 6685-01-346-2213
NSN 6685-01-508-5042
NSN 5990-01-411-5930
NSN 5895-00-225-9589
NSN 5999-01-562-3664
NSN 5999-00-724-3487
NSN 6685-01-634-0611