The 1-1/2″ 316 Stainless Steel Square Head Plug – SP114 is a heavy-duty industrial fitting designed for reliable performance in demanding piping systems. Made from premium 316 stainless steel, it provides excellent corrosion resistance in harsh environments, including marine, chemical, and high-moisture conditions, while safely sealing unused connections to reduce contamination risks. Equipped with ASME B1.20.1 NPT threads and a square head for easy installation and removal, it ensures a secure, leak-resistant fit for trunk lines, header connections, and maintenance isolation points. Rated for MSS Class 150 applications and compliant with ASME B31 piping codes, the SP114 delivers long-lasting, professional-grade performance. Order now for fast shipping and dependable results.