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 6320-01-029-4220
NSN 6610-01-313-8296
NSN 5990-01-584-8363
NSN 5915-00-445-9340
NSN 5965-01-275-5472
NSN 6610-00-209-4372
NSN 6135-01-445-6589
NSN 5910-00-121-3954
NSN 5985-01-444-9457
NSN 5985-00-218-1356
NSN 5895-01-223-3261
NSN 6135-00-276-7625