This is a BSP thread push fit stem connection. This fitting is specified to be used with reverse osmosis systems, fridge filters, pneumatic units and any other appliance that requires a 12mm stem fitting. This connector is available in the following sizes:
12mm x 1/2" BSP
12mm x 3/8" BSP
There are numerous material types this part will work in conjunction with. These include tubing (as well as flexible tubing like silicone and Tygon®, although soft tube supports will be needed), soft metals (copper, brass, mild steel) and semi-rigid plastics (nylon, polyethylene, polypropylene).
Constructed with food safe materials that have been approved by WRAS, ANSI, SK Zert, NSF-51 and NSF-61.