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 5950-00-907-5110
NSN 6610-00-553-5103
NSN 5905-00-776-0959
NSN 6620-01-585-5647
NSN 5965-00-102-8521
NSN 5905-01-462-0685
NSN 5985-01-197-5809
NSN 6105-01-280-1779
NSN 6110-00-617-0574
NSN 6320-01-246-4390
NSN 6135-00-078-9931
NSN 5935-01-407-9967