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 6110-01-391-2710
NSN 6650-00-575-0770
NSN 7035-00-500-7839
NSN 5925-00-911-8807
NSN 6240-01-322-4887
NSN 5990-01-429-6211
NSN 2925-01-199-4001
NSN 5996-01-083-5162
NSN 5835-01-229-6964
NSN 5910-00-871-3561
NSN 5990-01-627-8097
NSN 5975-01-013-9247