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 6150-01-343-9621
NSN 6105-00-051-4867
NSN 7035-01-136-7404
NSN 6685-01-245-8952
NSN 6150-01-415-5148
NSN 5985-00-517-7418
NSN 4140-00-110-4524
NSN 5990-01-455-8035
NSN 5895-00-408-9098
NSN 6145-01-590-1029
NSN 6105-01-057-2196
NSN 6110-01-230-2637