"BRONZE AC NO. 11306 GRADE C,2.500 IN. O/A LG,3.872 IN. MIN TO 3.873 IN. MAX O/A DIA,3.3765 IN. MIN TO 3.3785 IN. MAX DIA BORE THRU,3.750-16 NS-3B THD 0.625 IN. LG,2 MTG HOLES THRU WALL THREADED 0.312-18 NC 3B THD,2 EXTERNAL GROOVES 0.062 IN. W 0.031 IN. DP"