{"product_id":"sierra-18-4263-brass-pipe-plug-1-8in-27-npt-replaces-mercruiser-22-841908-chrysler-f700633","title":"Sierra 18-4263 Brass Pipe Plug, 1\/8 inch NPT, Replaces Mercury 22-328021","description":"\u003cp\u003eThe Sierra 18-4263 is a brass pipe plug sized for 1\/8 inch - 27 NPT threads, used to seal unused ports on marine exhaust manifolds, risers, and other threaded fittings. It is machined from brass for corrosion resistance in a marine engine environment and is a small, single-piece hardware item meant to be installed with pipe sealant rather than thread tape alone, since NPT tapered threads rely on a sealant such as Teflon-rated pipe dope to achieve a leak-free seal.\u003c\/p\u003e\u003cp\u003eThis plug is commonly used as a service and replacement part for engine and exhaust hardware where a factory plug has corroded, stripped, or been removed for inspection. It is also supplied as one of the included components in certain riser and manifold kits, alongside other Sierra parts, for installers who need a matching plug on hand during a rebuild. Because it is a simple sealing plug rather than a machine-specific part, it is used across a range of Chrysler, Mercury, and Mercruiser marine engine applications that call for a 1\/8 inch NPT brass plug.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-4263\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Pipe Plug\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Brass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size:\u003c\/strong\u003e 1\/8 inch - 27 NPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Type:\u003c\/strong\u003e NPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExterior Finish:\u003c\/strong\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions (L x W x H):\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.03 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Pieces:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282259129\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross-References:\u003c\/strong\u003e FI5810151, F700633, 22-328022, 22-328021, GLM 21893, 22-841908, 22-32802, 22-30139\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eUniversal 1\/8 inch - 27 NPT threaded port application; no engine-specific fitment is specified.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eChrysler FI5810151\u003c\/li\u003e\n\u003cli\u003eChrysler F700633\u003c\/li\u003e\n\u003cli\u003e22-328022\u003c\/li\u003e\n\u003cli\u003e22-328021\u003c\/li\u003e\n\u003cli\u003eGLM 21893\u003c\/li\u003e\n\u003cli\u003eMercruiser 22-841908\u003c\/li\u003e\n\u003cli\u003e22-32802\u003c\/li\u003e\n\u003cli\u003eMercury 22-30139\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat thread size does the Sierra 18-4263 pipe plug use?\u003c\/strong\u003e The Sierra 18-4263 has a 1\/8 inch - 27 NPT tapered pipe thread.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-4263 pipe plug made from?\u003c\/strong\u003e It is machined from brass, chosen for its corrosion resistance in marine exhaust and engine hardware applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need sealant to install the 18-4263 plug?\u003c\/strong\u003e Yes, a pipe sealant with Teflon is recommended on the threads of the 18-4263 to ensure a leak-free seal, since NPT tapered threads depend on sealant rather than thread tape alone.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-4263 a genuine OEM part or an aftermarket replacement?\u003c\/strong\u003e The 18-4263 is a Sierra aftermarket replacement plug manufactured to meet or exceed the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the 18-4263 cross-reference to?\u003c\/strong\u003e It is interchangeable with Chrysler FI5810151 and F700633, GLM 21893, Mercruiser 22-841908 and 22-32802, Mercury 22-30139, and 22-328021 \/ 22-328022.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-4263 pipe plug weigh?\u003c\/strong\u003e The Sierra 18-4263 weighs 0.03 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-4263 plug?\u003c\/strong\u003e It measures 0.39 x 0.39 x 0.39 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many plugs come in a package?\u003c\/strong\u003e Each package of the Sierra 18-4263 includes one pipe plug.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat finish does the 18-4263 plug have?\u003c\/strong\u003e The plug has a machined brass finish.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-4263 plug included with any other Sierra parts?\u003c\/strong\u003e Yes, the 18-4263 is supplied as one of the plugs included with certain Sierra exhaust riser and manifold kits, alongside parts such as 18-0897 and 18-4258.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 18-4263 be reused after removal?\u003c\/strong\u003e Because NPT pipe plugs rely on sealant for a leak-free fit, it is best practice to apply fresh pipe sealant to the 18-4263 each time it is reinstalled rather than reusing old sealant.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988178383067,"sku":"SIE-18-4263","price":4.46,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/sie-18-4263_large__61139.1558126642.500.750.jpg?v=1785187990","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-4263-brass-pipe-plug-1-8in-27-npt-replaces-mercruiser-22-841908-chrysler-f700633","provider":"Good Vibes Marina","version":"1.0","type":"link"}