0.3120" first hole diameter 3.7200" overall length four grooves, style 66 on hb surface, one groove style 69 on hb surface, one groove, style 69 on hp surface, four grooves, style 76 on hk surface 22c solid, external flange one end
3.5000" overall length jthree 0.3440 in. dia holes through flange face, one 0.1250 in. dia hole through flange od, tap drill 0.2188 in. dia 0.3800 in. deep, 1/4-28 unf tap to full depth, 90 deg. countersink 0.2800 in. dia 0.1900 in. deep 22c solid, external flange one end