This fitting is commonly 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 Thread tapered threads.
The brass adapter screws onto the faucet supply shaft, converting it to a "standard" 1/2" male NPT fitting to connect your vessel's plumbing.
A rubber sealing washer is included to seal the straight threaded female end.
This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm.
www.P65Warnings.ca.gov