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 6145-00-669-6795
NSN 6610-00-152-7216
NSN 6320-01-416-9357
NSN 6240-01-621-7646
NSN 7035-01-592-4412
NSN 5930-00-052-5208
NSN 7035-01-150-6303
NSN 5930-01-661-2441
NSN 5905-01-364-4281
NSN 6610-01-578-7771
NSN 6610-01-412-3318
NSN 5925-01-203-5310