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 6105-01-401-5361
NSN 6620-01-543-5491
NSN 6220-01-519-9305
NSN 7035-01-570-1095
NSN 6645-01-074-4063
NSN 5965-01-362-5624
NSN 5835-01-487-3042
NSN 5855-00-631-4565
NSN 5915-01-530-8380
NSN 5975-01-408-4599
NSN 4140-01-104-9279
NSN 5905-00-575-1158