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 5905-00-161-4042
NSN 5910-00-852-2657
NSN 5965-00-144-2543
NSN 5930-01-432-1129
NSN 6240-01-100-7105
NSN 5895-00-485-5347
NSN 5925-01-517-9408
NSN 5998-01-442-6392
NSN 5975-00-541-8531
NSN 5999-01-131-0048
NSN 6105-01-074-9074
NSN 6105-01-396-2195