Smith-Cooper 1/2 in. MPT Stainless Steel Square Head Plug

SCI Stainless Steel Fittings & Nipples are a cost-effective replacement for brass. They offer more Corrosion, Heat, and Pressure resistance than Brass and have always been Lead-Free. Stainless Steel doesn't cause electrolysis so you can use it with any other metal. Marine, automotive, agricultural, irrigation, and plumbing. The better choice is SCI Stainless Steel.