The 1-1/4" 316 Stainless Steel Square Head Plug - SP114 is a premium industrial fitting engineered for reliable performance in demanding piping systems. Crafted from high-grade 316 stainless steel, it offers superior corrosion resistance in marine, chemical, and high-moisture environments while securely sealing unused connections to reduce contamination risks. Featuring ASME B1.20.1 NPT threads and a square head for easy installation and removal, it ensures a 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 durable, long-lasting performance. Order now for fast shipping and professional-grade results.