A 1.5″ GI Back Nut is a galvanized iron (GI) fastening component used to secure and lock threaded pipe fittings in plumbing, gas, and industrial piping systems. It is typically used with unions, flanges, or pipe joints to provide extra stability and prevent loosening due to vibration or pressure changes.
Key Features:
✅ Size: 1.5 inches (nominal bore)
✅ Material: Galvanized Iron (GI) – Zinc-coated for corrosion resistance and durability
✅ Thread Type: BSP (British Standard Pipe) or NPT (National Pipe Thread), depending on system requirements
✅ Function:
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Secures threaded connections and prevents leakage
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Provides additional support in pipe assembly
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Used in conjunction with pipe unions or flanges
✅ Applications: -
Water supply and plumbing systems
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Gas and oil pipelines
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HVAC and industrial piping
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Firefighting and irrigation systems
✅ Durability: Strong, rust-resistant, and suitable for high-pressure environments
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