Joist hanger nails: Made for both indoor and out of doors use, these nails are generally double-dipped galvanized or stainless steel and particularly designed for setting up joist hangers. A detailed cousin from the finishing nail, the casing nail is a little larger sized and has improved Keeping ability. https://titusfhgeb.anchor-blog.com/2134456/what-does-stainless-steel-nails-mean