Make sure to choose the correct option for you use case.
Stock XR battery box and ELM/AV box use m20x1.5. ELM box does not require a rear locking nut while the stock XR battery box does require the rear locking nut.
For torque box either m20x1.5 or PG13.5 can be used, but PG 13.5 is a much tighter fit and requires threading directly into the torque box with a bit of force. It is still recommended to use a rear locking nut.
If the option for purchasing the gland with nut option is out of stock you may be able to combine the without nut option and the Nut ONLY option to get the complete item.