Air Logic (Racine, WI) offers a selection of swivel fittings with an o-ring seal located above the 10-32 UNF threads. The additional bottom seal ensures a leak-free connection. Three barb configurations are available: swivel elbows, swivel tees, and straight swivels. The design allows the barb to swivel 360 degrees in the threaded base. Nylon or polypropylene fittings are available with Buna-N, ethylene propylene, silicone, or Viton o-rings.