"ALUMINUM ALLOY AMS4640,ZINC CHROMATE COATED,5.750 IN. O/A LG,4.045 IN. MIN TO 4.055 IN. MAX O/A W,2.305 IN. MIN TO 2.315 IN. MAX O/A H,2 MTG HOLES 0.565 IN. MIN TO 0.573 IN. MAX DIA 0.910 IN. DP TAPPED 0.625-18 UNF-3BTHD 0.875 IN. DP,MACHINED SURFACES 32.0 63.0 AND 125.0 MICROINCH FINISH,COMPONENTS BLOCK 1,BUSHING 1"