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 6105-00-466-9880
NSN 6645-00-390-7657
NSN 6685-00-702-3074
NSN 6320-01-527-0211
NSN 5996-01-605-3377
NSN 6135-00-708-0892
NSN 5950-01-279-4863
NSN 5998-00-205-2951
NSN 6685-01-281-8860
NSN 5930-01-348-4472
NSN 6145-00-949-3331
NSN 6650-00-952-2754