Pneumatic Fitting POC4-M5

From the shop's description

Metric Size – BSPT Thread (R Thread) MODEL Tube Size Thread Size Description POC 04-M5 4mm M5 Round Male Straight 4mm M5 POC 04-M6 4mm M6 Round Male Straight 4mm M6 POC 04-01 4mm R1/8″ Round Male Straight 4mm R1/8″ POC 04-02 4mm R1/4″ Round Male Straight 4mm R1/4″ POC 6-M5 6mm M5 Round Male Straight 6mm M5