These smooth shank Joist Hanger Nails are manufactured to the specifications of several of the large joist hanger makers. Stock number J-131 crosses-over to the Kant-Sag "NA11" and Simpson "N8", while the stock number J148 crossesover to Kant-Sag "NA9D" and Simpson "N10". The Maze advantage is that our nails are STORMGUARD Double Hot-Dipped Zinc-Coated for superior corrosion resistance. And, you can order these top-quality nails along with your other Maze products in bulk and packaged. For ring shank joist hanger nails, see J131A or J148A.