1-3/4(45mm) THRU HOLE DIAMETER. Back mounting screws distribution parameter dia: 142mm. Back mounting recess dia: 130mm. The item "6 4-JAW SELF-CENTERING LATHE CHUCK front mounting for rotary table #0604F0-SFM" is in sale since Monday, June 4, 2018.This item is in the category "Business & Industrial\CNC, Metalworking & Manufacturing\Workholding & Toolholding\Workholding\Rotary Tables". The seller is "niuniucme" and is located in Madison Heights, Michigan. This item can be shipped worldwide.