BT60 Min Dia Retainers (Aerotech Type 5/16" Threaded)
Minimum Diameter Retainer that fits only Mach 1 BT60 tubing. This retainer is lightweight and is held in via three screws into the side of the pre-tapped brass inserts in the side. It's a two piece retainer with a 1000 lb kevlar loop for attaching recovery. Easy to install. Just screw on your motor (Requires a threaded forward closure) mark your side holes, and drill. Re-insert and attach via the provided screws.
This insert is much easier to install before building the rocket.