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 4140-01-278-3874
NSN 5975-00-383-7679
NSN 6130-00-397-7690
NSN 6645-00-917-6225
NSN 6645-00-038-7737
NSN 6610-00-641-3015
NSN 6135-00-016-0071
NSN 5999-01-151-1471
NSN 6240-00-115-8575
NSN 5960-01-654-4353
NSN 5975-01-440-6568
NSN 6685-01-029-6133