Company item name--drill bushing, shank
No other part numbers with same form, fit, and function found.
NSN 6135-00-209-6918
NSN 5996-00-205-2933
NSN 5915-00-403-1420
NSN 4140-00-205-6491
NSN 5835-00-148-9719
NSN 6650-01-315-9728
NSN 5950-01-029-3292
NSN 7035-01-271-1643
NSN 6320-00-160-0899
NSN 6130-01-608-7040
NSN 5905-01-475-2338
NSN 5935-00-069-4567