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 5985-00-136-7497
NSN 5855-00-127-5559
NSN 2925-00-203-8735
NSN 6650-00-796-9972
NSN 5925-00-010-7490
NSN 5930-00-930-4433
NSN 5990-01-173-7238
NSN 2925-00-899-4261
NSN 6220-00-271-4639
NSN 5910-01-463-6664
NSN 2925-01-570-3690
NSN 6110-01-656-1611