This adapter can be used to plumb Scandvik faucets that have 3/8" BSP male threaded supply shafts.
It converts British Standard Pipe Parallel (straight) threads to National Pipe Straight threads. Even though it has straight National Pipe threads, it will still make a seal in female NPT (tapered) pipe fittings.
Alternatively, the brass SCA 10002 is an NPT version.
The nylon adapter screws onto the faucet supply shaft, converting it to a 1/2" male NPS fitting to connect your vessel's plumbing.
A rubber sealing washer is included for the straight threaded female end.