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 5855-01-444-5248
NSN 5960-01-153-9195
NSN 6685-00-456-5742
NSN 5925-01-313-3895
NSN 5945-00-603-2919
NSN 6110-01-128-3050
NSN 4140-01-105-4823
NSN 2925-01-532-2477
NSN 5835-01-143-9143
NSN 5960-01-536-9763
NSN 6110-01-069-1908
NSN 6110-00-072-9394