These weld-less stainless steel bulkhead fittings can be used on various tanks, totes, sumps, kettles, or pots in the industrial, chemical, agricultural, brewery, or food industries (black poly not food rated). We offer several styles based on user preferences, installation methods, or ease of assembly or access. The inner and outer threads on the bulkhead allow for multiple attachment options. The gaskets/seals are offered in Nylon - ensure they are compatible with the fluid being conveyed.