>>12002216a barrel nipple? these are turned with"stilsons" (pipe wrench)
they are cheaper because it's just a piece of pipe threaded on each end and you can make it however long you want, or cut it in half and weld it, etc.
The BSP nipple in your pic would be more suited to hydraulics, where things need to be tight and not have big ugly pipe wrench scars all over it.
