CONCORD 1/2" Weldless Bulkhead Fitting for Beer Wine. Full 304 Stainless Steel Concord 1/2" Weldless 304 Stainless Steel Bulkhead Fitting Every piece in this set is made of solid 304 Stainless Steel. Easily attaches to any 1/2" NPT Ball Valve, Thermometer, Etc Easily installs onto your weldless brew kettle setup. Natural Silicon rings is fully heat resistant. Solid 304 Stainless pieces will ensure to last a lifetime. Disclaimer: This Weld-less Bulkhead fitting, as well as all fittings, requires thread tape to be leak free!!