1/2 inch-13 hex
No other part numbers with same form, fit, and function found.
NSN 6320-01-271-0247
NSN 5960-01-425-1454
NSN 6650-01-109-3251
NSN 5965-01-366-0598
NSN 5915-01-557-5332
NSN 5996-01-624-7629
NSN 6240-01-163-8795
NSN 5855-01-049-5354
NSN 5965-01-189-4805
NSN 5996-00-539-7956
NSN 6130-01-374-6718
NSN 4140-01-086-6536