You're just confused by the nomenclature. It's M16-1.5, which is a metric 16mm bolt with a thread-pitch of 1.5mm. Regardless, the Fumoto F-108 is the standard drain valve that fits your car. If you want to attach a hose to the end of the valve, get the F-108S or F-108N.

I'm using this one. https://www.amazon.com/gp/aw/d/B004FFHH0M/ref=ppx_yo_mob_b_inactive_ship_o1_img?ie=UTF8&psc=1
The other variations on that number either have a longer nipple or none. You can get the hose if you want it, I don't use it. So nothing else needed technically.