Reducing hexagon nipple (male 1/2 BSPT - male M16)

Male-male hydraulic reduction nipple used for some compressor heads that have metric threads.

The reduction is from ½ inch British BSPT to M16 metric.
Indispensable if you want to make a conversion to also use it as a vacuum pump as shown in this video:

Air Compressor to Vacuum Pump Conversion (youtube.com)

The nipple is very difficult to find because it uses a reduction from British piping (in inches) to the European metric standard (in mm), and those who produce it in metal are rightly overpricing for it.

Design by G3ODESIGN on MakerWorld (license: BY).