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 7035-00-275-5604
NSN 5985-00-905-6609
NSN 6610-01-272-9691
NSN 6105-01-438-8546
NSN 5935-01-467-4464
NSN 5950-01-118-1898
NSN 5925-01-350-3646
NSN 5960-01-467-0961
NSN 5895-01-132-3706
NSN 6150-00-056-8743
NSN 4140-01-168-8796
NSN 5915-01-119-2725