{"product_id":"bk-521-401hn-malleable-black-iron-pipe-cap-1-4-in","title":"Bk 521-401HN Malleable Black Iron Pipe Cap 1\/4 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe BK 521-401HN is a 1\/4 inch malleable black iron pipe cap designed to terminate open pipe ends in gas, air, and general plumbing systems. Cast from malleable black iron conforming to ANSI\/ASTM A-197, this cap meets dimensional standards ANSI\/ASME B16.3, B16.14, and B16.39, with threads cut to ANSI B1.20.1. Each fitting is individually flag tagged and 100% inspected and quality tested before shipment. Plumbers, pipefitters, and HVAC technicians use this cap to close off threaded pipe ends during installation, testing, or when capping unused branch connections.\u003c\/p\u003e\n\u003cp\u003eThe 521-401HN is suited for residential and light commercial piping systems where a threaded black iron cap is required. Common applications include capping gas supply branch lines, compressed air lines, and other ferrous pipe systems. The fitting weighs 0.067 pounds, making it a standard lightweight cap for 1\/4 inch NPT threaded pipe. It is sold individually and is appropriate for new construction, retrofit, and service applications.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eMalleable black iron construction per ANSI\/ASTM A-197 for durability in ferrous pipe systems\u003c\/li\u003e\n  \u003cli\u003eThreaded to ANSI B1.20.1 NPT standard for reliable sealing on 1\/4 inch pipe\u003c\/li\u003e\n  \u003cli\u003eDimensional compliance with ANSI\/ASME B16.3, B16.14, and B16.39\u003c\/li\u003e\n  \u003cli\u003e100% inspected and quality tested per manufacturer standards\u003c\/li\u003e\n  \u003cli\u003eIndividually flag tagged for easy identification and inventory tracking\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement and standard-fit cap for 1\/4 inch NPT threaded black iron pipe systems in gas, air, and general piping applications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by licensed plumbers or pipefitters in accordance with applicable local codes and IFGC or IPC requirements. Shut off and depressurize the supply line before installing or removing any threaded fitting. Apply an appropriate thread sealant or PTFE tape to the male threads before threading on the cap. Do not overtighten; use a pipe wrench and follow standard hand-tight-plus-turns practice to avoid cracking the fitting.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Malleable Black Iron\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: ANSI B1.20.1 NPT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePipe Size\u003c\/strong\u003e: 1\/4 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensional Standard\u003c\/strong\u003e: ANSI\/ASME B16.3, B16.14, B16.39\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Standard\u003c\/strong\u003e: ANSI\/ASTM A-197\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.067 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSold As\u003c\/strong\u003e: Each\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: BK\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 521-401HN\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"B\u0026K","offers":[{"title":"Default Title","offer_id":51346322489650,"sku":"521-401HN","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/310549897.jpg?v=1782077479","url":"https:\/\/voomisupply.com\/products\/bk-521-401hn-malleable-black-iron-pipe-cap-1-4-in","provider":"Voomi Supply","version":"1.0","type":"link"}