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 6645-01-542-3672
NSN 5855-01-381-7493
NSN 5960-01-449-1310
NSN 5925-00-479-8233
NSN 5975-01-213-7389
NSN 4140-01-108-9084
NSN 5990-01-460-6390
NSN 5998-01-400-1991
NSN 6320-00-857-4073
NSN 6645-00-230-4396
NSN 5925-00-465-4534
NSN 5996-01-155-8924