Cage 4s077 state they are the oem
No other part numbers with same form, fit, and function found.
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).
NSN 6610-01-558-1815
NSN 5915-01-188-8260
NSN 5985-00-034-5268
NSN 6135-01-562-6582
NSN 6130-01-440-5166
NSN 5999-01-110-3387
NSN 5975-01-607-0279
NSN 6685-01-602-9019
NSN 6105-01-497-6913
NSN 5985-01-464-2266
NSN 6150-00-739-4425
NSN 6320-00-564-2772