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 6645-01-555-9856
NSN 6620-01-072-1034
NSN 6135-01-392-8344
NSN 5855-01-492-5666
NSN 5975-01-612-3537
NSN 7035-00-299-7150
NSN 5985-00-784-3663
NSN 6320-00-925-0558
NSN 6110-01-491-6704
NSN 6105-01-573-0313
NSN 6240-01-488-9811
NSN 6145-00-451-3534