M38B, Minimum Diameter Motor Retainer, 38mm, with Bypass Holes

Minimum Diameter Retainer, 38mm, with Bypass Holes   For 38mm Minimum Diameter Airframes or 38mm Motor Mount Tubes Includes Holes That Allow Ejection Charge Gases To Bypass Retainer For Use With AeroTech Forward Closure Adapter P/N 38FCRRA 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! Top of Retainer Has a 10-24 Threaded Hole for Accessory Attachment (Aeropack)