M38, Minimum Diameter Motor Retainer, 38mm

Minimum Diameter Retainer, 38mm For 38mm Minimum Diameter Airframes or 38mm Motor Mount Tubes Precision Machined 6061-T6 Aluminum With Mil-Spec Type II Red Anodizing 5/16-18 Stainless Steel Stud For Fast, Tape-Free & Tool-Free Motor Change Requires Forward Closure With 5/16-18 Threaded Hole Bonds Into Airframe With J-B Weld or High Strength Epoxy Just Slide Motor In And Screw Onto Stud Mount, That`s It! (Aeropack)