{"product_id":"anvil-3-8-in-fpt-galvanized-malleable-iron-lock-nut","title":"Anvil 3\/8 in. FPT Galvanized Malleable Iron Lock Nut","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Anvil 3\/8 in. FPT Galvanized Malleable Iron Lock Nut — a purpose-built securing solution for 3\/8\" female pipe thread fittings. Crafted from durable malleable iron and finished with a rugged galvanized coating, this lock nut is designed to stand up to moisture, temperature changes, and everyday use in both residential and light industrial piping applications.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003e3\/8\" FPT compatibility:\u003c\/strong\u003e Precisely sized for standard female pipe threads, delivering a reliable, leak-resistant connection where it matters most.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eGalvanized finish:\u003c\/strong\u003e Provides corrosion resistance in damp, outdoor, or humid environments, extending the life of your fittings without sacrificing performance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMalleable iron construction:\u003c\/strong\u003e Combines strength with ductility to maintain a strong lock under vibration, pressure fluctuations, and repeated disassembly\/reassembly.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaximum pressure up to 150 psi:\u003c\/strong\u003e Suitable for typical residential and light commercial water lines and other low- to moderate-pressure piping systems.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePro-grade reliability:\u003c\/strong\u003e Designed by Anvil to deliver consistent performance when securing fittings in everyday plumbing, irrigation, and light industrial setups.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eIdeal use cases\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eSecuring 3\/8\" FPT connections in water supply lines, irrigation hardware, and garden plumbing projects.\u003c\/li\u003e \u003cli\u003eReplacing worn or corroded lock nuts in damp basements, crawl spaces, or outdoor installations where moisture is a factor.\u003c\/li\u003e \u003cli\u003eMaintenance and repair tasks that require a dependable, reusable lock nut to keep fittings tight over time.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eInstallation tips\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eEnsure mating parts have compatible male threads; clean threads before assembly for a seal that lasts.\u003c\/li\u003e \u003cli\u003eUse appropriate thread sealant tape or paste if your system requires it, and tighten to a secure fit without over-torquing.\u003c\/li\u003e \u003cli\u003eAfter installation, perform a leak test to verify the connection and recheck periodically in environments with vibration or temperature cycling.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eChoose the Anvil 3\/8 in. FPT Galvanized Malleable Iron Lock Nut for a durable, corrosion-resistant, and reliable locking solution that keeps your fittings secure. It’s the practical, field-tested choice for real-world piping challenges.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Anvil","offers":[{"title":"Default Title","offer_id":52169085944082,"sku":"46225","price":7.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0928\/1024\/8466\/files\/46225_A.eps_High.jpg?v=1775414896","url":"https:\/\/nationalhardwaregroup.com\/products\/anvil-3-8-in-fpt-galvanized-malleable-iron-lock-nut","provider":"National Hardware Group","version":"1.0","type":"link"}