Kreg SML-C250S5-50 Pocket-Hole Screw, #8 Thread, 2-1/2 in L, Coarse Thread, Maxi-Loc Head, Square Drive, 50/PK

Kreg® stainless screws are specially designed for maritime applications, excessive exposure to water and other exceedingly corrosive environments, such as ACQ-treated lumber. If you're looking for the excellent in rust-prevention, this is your solution.