0.3750" first hole diameter 5.4740" overall length 2 security holes on flange, 0.3750 in. dia evenly spaced opposite oil grooves on a 5.6250 in. bolt circle 22c solid, external flange one end
0.3906" first hole diameter 6.3494" overall length 2 holes 0.3906 in. dia drilled through flange on a 6.3750 in. bolt circle 22c solid, external flange one end