"RAW CASTING 356-T6 ALUMINUM ALLOYQQ-A-601; SURFACE TREAT PER MIL-A-8625TYPE 2 CLASS 1 CHEM FILM REMACHINED AREAS PER MIL-C-5541,TYPE 1 CLASS 2; CONSISTS OF 3 INSERTS 4 STUDS 4 DOWEL PINS 1 PIN 1 LINEAR BEARING; 3.680 IN. OVERALL DEPTH; MOUNTING FLANGE 14 HOLES0.265 IN. MIN DIA AND 0.275 IN. MAX DIA; PART OF GEAR BOX"