2.1780" overall width 101 teeth 33.6670 in. nom pitch dia on id, alemite 1644-b lub fitting located in loading plug, 20 holes 1/2-13 unc-2b thd 0.7500 in. min deep equally spaced on 35.5000 in. dia bolt circle on extended side of inner ring, 18 holes 0.6875 in. dia through, equally spaced on 40.1300 in. dia bolt circle on outer ring