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 5985-01-151-3224
NSN 5950-01-142-7859
NSN 6145-00-266-8453
NSN 5915-01-570-0108
NSN 5998-01-017-7210
NSN 5990-01-113-0303
NSN 6130-01-044-5436
NSN 5905-01-465-1248
NSN 5930-01-125-9165
NSN 5975-01-658-9155
NSN 6130-00-187-0211
NSN 5895-00-186-8572