Looking for a fitting from a thread to a barb, so barb one end, threaded 'hole' the other. Now, my calipers say 13mm O/A across the threads, and it screws into my secondary regulator, which I took a john Guest fitting out, which is stamped BSP.
I assume then I am looking for a BSP but what size?
I assume then I am looking for a BSP but what size?
