This aluminium ring nut screws onto the mouth of the RGV Trita Express mincer and tightens the grinding assembly, holding the blade and the perforated plate firmly locked against the body of the machine. Made of aluminium, it provides a solid grip during tightening and keeps the cutting assembly stable throughout meat processing, without loosening or unwanted vibration. Being lightweight and corrosion-resistant, aluminium also makes it easy to fit and remove the blade-and-plate assembly, simplifying cleaning and the replacement of grinding accessories. It is a replacement part for the RGV Trita Express mincer, code 110407, designed to replace the original ring nut once it is no longer effective. Replacement is recommended when the thread is worn, when the part no longer tightens the blade and plate properly, or when play or looseness is noticed during use: conditions that can affect grinding quality and the correct operation of the appliance.