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 4140-00-390-2373
NSN 5930-01-048-7313
NSN 5950-00-971-1096
NSN 6320-01-255-2096
NSN 6150-01-337-2504
NSN 5975-00-911-6340
NSN 6105-01-587-4908
NSN 6610-01-519-8953
NSN 6220-01-007-0179
NSN 5975-01-170-4643
NSN 5925-00-606-6529
NSN 5925-01-286-6590