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 5990-01-465-8031
NSN 5999-01-435-5304
NSN 6105-00-551-3747
NSN 6150-00-100-1302
NSN 6240-01-394-8592
NSN 6685-01-377-4716
NSN 5925-01-511-5852
NSN 5998-01-618-0046
NSN 6685-01-461-4057
NSN 6145-01-401-3713
NSN 6220-01-479-7950
NSN 5855-01-302-9778