Is Ross W1616C2020 a valid part number, or is there a replacement?

Some years ago, "W" prefix called-out  “World Thread” …  Ross’s own sort-of universal thread.  Supposedly it was compatible with both BSPP (European)  -and- NPT (North American) fitting types.  Today, only NPT threads are available. So customer may need to adapt if they were using Euro thread fittings.

Consider 1616C2020,-plus- an alpha suffix to indicate coil voltage  (Z = 120 VAC, W=24 VDC, etc)