ENGINEERS TAPERED ADAPTOR.

UNSURE WHAT THIS IS USED FOR.

TAPER DIMENSIONS:–

0.648″ LARGE.

0.530″ SMALL.

1.97″ LONG.

NOT THE USUAL MORSE TAPER.

5/16″-24 UNF THREAD x 0.475″ LONG,

WITH A 0.375″ DIAMETER LOCATION BEHIND.

3.76″ O/ALL—-0.213″ DIA CROSS HOLE.

BRAND NEW.