MV3500 oil change (already tried search)

Ok, this my be a noob question, but what size are the damn filler and drain plugs!!!???

I have tried the search on a few boards already, and even asked the dealer, and I cannot seem to get an answer. I am about the change the gear oil in the tranny and need to buy a wrench to remove the tranny plugs. The dealer told me either 55-60 torx (wrong), 3/8 Hex (wrong), or 24mm ( thats seems way too big, and mine looks to take a hex wrench.

Help Please :dunno:

and yes, I know its NV not MV sorry for the grammatical error

17mm or 11/16th

:yelclap: Thats what I thought! I just wanted a second opinion before I went out to buy the wrench, Thanks jneary!!

no problem