LML New wheels, need lug nuts or not?

[pepe]

Guys,
I've got a 2012 duramax with 20" stock wheels. I just purchased a new set of Fuel Off-Road wheels and I am getting mixed information on the lugs nuts required. I've been told the stock lug nuts will work as long as they have a 60 degree conical seat. I have also been told I need to order conical splined lug nuts. What degree seat are the stock lug nuts? Will I need to order a new set of lug nuts? Any suggestions or recommendations on lug nuts should I need to buy?
The new wheels are black and the center cap covers the lug nuts. I've included a photo of the new wheels. (Truck is black)
Thanks guys!

 

[02 nasty max]

I have used both I always use my stock ones to save money if the center cap covers them just haft to use a chrome socket where the wall is thinner

 

[Sledheadxp800r]

Fuel wheels require aftermarket lug nuts because they are recessed deep into the wheel and the hole is tiny. A stock lug nut wont even fit inside. You'll either need spline drive lugnuts or a smaller diameter lug nut and a thin wall socket.