A. Heat treated 560 degrees to 600 deg
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: Articles of plastics & articles of other materials of heading 3901 to 3914, nesoi
NSN 4140-01-152-2672
NSN 5925-01-090-8336
NSN 6150-00-221-2593
NSN 5910-00-269-3104
NSN 5930-00-333-4636
NSN 5905-00-422-3865
NSN 6610-01-094-8442
NSN 6110-01-166-3859
NSN
NSN 5905-01-561-0480
NSN 6150-01-469-0513
NSN 5998-00-276-8599