If you replace this part with an analog one in the machine, you can attach and use a wide range of accessories for industrial machines, such as edge guides, turners, ribbon and rubber guides, and bias nozzles. It is an almost 100-year-old fastening standard - the distance and position of the fastening holes from the needle is fixed to ensure the suitability of the attachment of accessories.
Use the binding nozzle with a short transparent presser foot named I (you can find it in the machine kit).
The set includes: mounting piece with bronze threads and 2 screws
The part can be installed on all JUKI machines with G, F or DX in the model name (G, F and DX model series)