STAINLESS STEEL 17-4PH PER AMS-5643 HEAT TREAT TO COND H1150 PER MIL-H-6875; 2.000 IN. LG; 2.250 IN. DIA BASE; FOUR 0.205 IN. DIA MTG HOLES EQUALLY SPACED ON A 1.844 IN. DIA BOLT CIRCLE ON THE BASE; TWO 0.377 DIA HOLES THRU FOR CLEVIS TYPE END FOR THE PIVOT FUNCTION