The material must be solution annealed at 2200 degrees f for 20 minutes in a vacuum or hydrogen atmosphere, the cooling rate must be equivalent to rapid air cool. The sleeve corners are rounded at a radius of 0.011 to 0.014 in.
A tubular shaped item with a round or hexagon peripheral shape having two flat bearing surfaces perpendicular to the axis of the centrally located hole. It is designed to maintain a predetermined distance between assembled parts. The item may be with or without flange(s) of any peripheral shape. The overall length must exceed 25 percent of the outside diameter or distance across peripheral flats of the body. (when the length, outside diameter, and/or distance across peripheral flats are designed as a tolerance, the maximum dimension will be used to determine compliance). For items having other than a round or hexagon peripheral shape, see spacer, plate. Excludes items with lubricating features, see bearing, sleeve and bushing, sleeve. See also bushing, tapered; spacer, ring; washer, flat; and washer, (as modified).
Classification: Cobalt, wrought, and articles thereof
NSN 5895-01-634-0630
NSN 5996-01-260-2993
NSN 5945-01-491-4528
NSN 5945-01-420-5891
NSN 6320-01-243-2276
NSN 5835-01-521-0298
NSN 6650-00-172-7519
NSN 5975-00-601-3143
NSN 5915-00-111-1363
NSN 6620-01-212-4298
NSN 5999-01-501-5783
NSN 5895-01-592-3444