Stout faucet shank is the same as any other, 7/8"x 14 straight pipe threads.
Faucets do tend to be pricey; the Amazon listing for a chrome faucet is a good deal if you are a Prime member. Ritebrew has the same faucet for less but it's out of stock. Stainless steel versions will likely cost a good $15-20 more...
Cheers!