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 6110-01-511-2495
NSN 6320-00-905-0543
NSN 6610-01-013-1959
NSN 6145-01-586-0681
NSN 4140-01-003-9850
NSN 5975-01-580-0851
NSN 5905-01-037-5101
NSN 6685-01-167-4841
NSN 5965-00-342-5126
NSN 6105-01-036-7789
NSN 5905-00-956-8325
NSN 2925-01-262-1418