Brass half nut 1/2" 6mm

This brass nut has a female thread of 3/8” bsp and a height of 6mm. The outer size is 21 or 24mm, this can vary sometimes and can’t be selected. So where is this brass hex nut used in espresso machines? You can find this model hex nut mainly on water and steam taps of brands like, Royal, La Spaziale,  La Scala, Nuova Simonelli, Victoria...

Brass half nut 1/4" 7mm hex 20

Brass half nut 1/4" 5mm hex 20

Brass fittings used on espresso machines are generic items, seen they are used in quite a lot of coffee machines. This specific model is a nut with a 3/8” BSP-G thread with a height of 6mm. The wrench size used for this item is a 21. Which models use this 3/8” BSP-G nut.? Well you can find this nut with brands like: Gaggia, Saeco, Victoria...