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 6240-01-565-8176
NSN 6650-00-053-4907
NSN 4140-01-607-4738
NSN 6135-00-951-3426
NSN 5935-01-067-8146
NSN 6610-01-296-4462
NSN 5930-01-245-9320
NSN 6240-00-635-6069
NSN 6145-00-504-5221
NSN 5950-00-768-7350
NSN 5855-01-486-9924
NSN 5855-01-464-5084