{"product_id":"sigma-818902579-2-inch-mnpt-square-head-plug-150-lb","title":"Sigma 818902579 2 Inch Mnpt Square Head Plug 150 Lb","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SIGMA 818902579 is a cored square head plug designed for threaded pipe systems in plumbing, mechanical, and industrial piping applications. With a 2-inch nominal size and male NPT (MNPT) end style, this plug threads directly into female NPT fittings to cap or temporarily close off a pipe run. Constructed from malleable iron with a black oxide finish, it is rated at 150 lb, making it suitable for low-pressure steam, water, oil, and gas service in standard pipe systems. Plumbers and pipefitters install this fitting as part of routine system assembly or pressure-testing procedures.\u003c\/p\u003e\n\u003cp\u003eThis square head plug is used in residential and commercial piping systems where a threaded closure is required. The cored design provides a consistent wall thickness throughout the casting. The MNPT thread allows direct engagement with standard female NPT pipe fittings and couplings. It is a common component in mechanical rooms, process piping, and hydronic systems where temporary or permanent pipe capping is needed at 2-inch connection points.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e2-inch nominal MNPT thread for direct engagement with standard female NPT fittings\u003c\/li\u003e\n  \u003cli\u003e150 lb pressure class rating suitable for water, steam, oil, and gas service\u003c\/li\u003e\n  \u003cli\u003eMalleable iron construction provides strength and resistance to impact and vibration\u003c\/li\u003e\n  \u003cli\u003eBlack oxide finish offers corrosion resistance in typical piping environments\u003c\/li\u003e\n  \u003cli\u003eCored square head design allows positive wrench engagement during installation and removal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or new-installation fitting compatible with standard 2-inch female NPT threaded pipe connections in 150 lb class piping systems.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by licensed plumbers or pipefitters using a pipe wrench or socket tool sized to the square head. Shut off and depressurize the piping system completely before installing or removing any threaded fittings. Apply thread sealant tape or pipe dope to the male threads per applicable codes such as the IPC or IFGC before engagement. Do not overtighten, as malleable iron fittings can crack if excessive force is applied.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNominal Size\u003c\/strong\u003e: 2 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnd Style\u003c\/strong\u003e: MNPT (Male National Pipe Thread)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePressure Rating\u003c\/strong\u003e: 150 lb\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Malleable Iron\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Black Oxide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Style\u003c\/strong\u003e: Square Head, Cored\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: SIGMA\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 818902579\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SIGMA","offers":[{"title":"Default Title","offer_id":51524752408882,"sku":"BLPL2I-LF","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b7fa60f85911efd2327b7d52f8ddca0b_44d6c15c-5de3-4ae7-ad8f-fd92d09fb194.jpg?v=1785456898","url":"https:\/\/voomisupply.com\/products\/sigma-818902579-2-inch-mnpt-square-head-plug-150-lb","provider":"Voomi Supply","version":"1.0","type":"link"}