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 5930-01-271-7590
NSN 7035-00-111-4389
NSN 7035-01-483-1776
NSN 5855-00-797-8217
NSN 6645-00-684-3424
NSN 5950-01-065-5542
NSN 5960-00-285-1001
NSN 5945-01-223-8563
NSN 5945-00-061-8319
NSN 6145-01-511-3697
NSN 5920-01-146-1290
NSN 6320-01-227-2648