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 5985-00-421-6787
NSN 5998-01-435-2774
NSN 6145-01-545-5263
NSN 5855-01-529-8717
NSN 5975-01-101-4190
NSN 6645-01-597-2222
NSN 5950-01-476-6160
NSN 6320-00-139-1090
NSN 6610-00-816-4998
NSN 5905-00-292-1113
NSN 5945-01-170-6666
NSN 6220-01-379-6692