The Milcarb 1/2 Inch FNPT X CO2 Fill Nipple is an essential component for filling Liquid CO2 Tanks. It can be found in both the Milcarb Fill Box product line and the Milcarb Direct fill kit. To complete the filling process, the Milcarb Wing Nut Coupler is used in conjunction with this CO2 Fill Nipple. This high-quality product is designed to provide reliable and efficient CO2 gas distribution for various industrial applications. Trust Milcarb to provide the best equipment for your CO2 gas distribution needs.