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 5920-00-170-3576
NSN 6110-01-173-4946
NSN 5960-01-306-4606
NSN 6135-01-071-4410
NSN 5985-00-584-0052
NSN 5895-01-421-4160
NSN 5835-01-632-6627
NSN 5960-01-641-5493
NSN 5835-01-510-1873
NSN 6685-01-581-5462
NSN 5950-01-487-6883
NSN 6130-01-564-3824