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 5975-00-331-7061
NSN 5960-01-349-8791
NSN 5950-01-214-6934
NSN 6320-01-414-4568
NSN 5996-01-497-6996
NSN 5985-01-361-2811
NSN 5999-01-176-5157
NSN 6220-01-038-8292
NSN 5905-00-782-1508
NSN 2925-00-629-1705
NSN 5930-00-964-9297
NSN 6130-01-212-8545