STEEL AMS6415;ROCKWELL C HARDNESS 40-44;6.680 IN. LG;4.625-8 NS-3A THD SHOULDER;2.875-20 UNS-2B THD INTERNAL FLANGE;THREE 0.375-24 UNF-3B THD HOLES EQUALLY SPACED ON 2.2165 IN. DIA BOLT CIRCLE;NINE 0.142 IN. DIA HOLES EQUALLY SPACED ON 3.160 IN. DIA BOLT CIRCLE;THREE 0.626 IN. MIN 0.627 IN. MAX DIA HOLES SPACED 120 DEG THRU SLEEVE OD