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 5930-01-532-6589
NSN 6145-01-605-9983
NSN 6320-01-513-9166
NSN 6685-00-538-8656
NSN 6130-00-823-8481
NSN 2925-01-330-2988
NSN 6240-00-902-9310
NSN 5960-01-586-5235
NSN 5925-01-629-5314
NSN 5905-01-095-4603
NSN 6130-00-231-0660
NSN 7035-00-938-1505