M1ES, Min Diam Retainer Extension Set, 4 each for 5/16 Studs

Min Diam Retainer Extension, 5/16 Stud, 4.5-6.6" Length For 38mm & 54mm Minimum Diameter Retainers Allows Use Of Shorter Length Motors Includes 4 extensions, one each M1E1.8, M1E2.2, M1E3.0, M1E4.5 Precision Machined 6061-T6 Aluminum With Mil-Spec Type II Red Anodizing 5/16-18 Stainless Steel Stud & 2 Stainless Steel Jam Nuts Attaches To Motors Forward Closure Just Slide Motor In And Screw Extension Onto Retainers Stud Mount, That`s It! (Aeropack)