{"product_id":"hex-head-pipe-plug-male-o-ring-npt-pt-stainless-steel-304","title":"Hex Head Pipe Plug Male O-Ring Face Seal NPT\/PT Stainless Steel 304 — 1\/8\" to 2\"","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"hdiy-desc\"\u003e\n\u003c!-- ① OVERVIEW --\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eHex Head Pipe Plugs with O-Ring Face Seal — Solid 304 Stainless Steel for NPT \u0026amp; PT Ports\u003c\/h2\u003e\n\u003cp\u003eWhen an unused port leaks — even a slow seep — it can compromise an entire hydraulic circuit, pneumatic system, or plumbing installation. Maintenance technicians, machine builders, and DIY plumbers who work with threaded pipe systems need a plug that seals reliably the first time and holds up over years of service without corroding, loosening, or requiring constant re-torquing.\u003c\/p\u003e\n\u003cp\u003eEach plug is machined from solid 304 stainless steel (A2 grade) and features a hex head drive for easy wrench installation. The O-ring face seal (ORFS) design creates a positive, leak-free seal at the port face rather than depending on thread engagement alone. Available in both NPT (National Pipe Taper) and PT (BSP Taper) thread standards, with sizes ranging from 1\/8\" to 2\" (approximately 10mm to 60mm thread OD). Sold individually or in 2-piece sets depending on the size selected.\u003c\/p\u003e\n\u003cp\u003eTypical applications include capping unused hydraulic manifold ports, sealing off pneumatic valve block openings, plugging test ports on industrial machinery, and closing off pipe ends in stainless steel plumbing systems — all situations where a stainless steel NPT pipe plug or BSP pipe plug with a reliable O-ring seal is the right solution.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- ② COMPATIBILITY BAR --\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e🔩\u003c\/span\u003e \u003cstrong\u003eThread Compatibility:\u003c\/strong\u003e Available in NPT (US standard, 60° angle) and PT\/BSPT (metric\/international, 55° angle). NPT and PT threads are \u003cstrong\u003enot interchangeable\u003c\/strong\u003e — confirm your port standard before ordering. Select your thread type and size using the variant options above.\u003c\/div\u003e\n\u003c!-- ③ KEY FEATURES --\u003e\n\u003ch2\u003e✅ Key Features of These Hex Head Stainless Steel Pipe Plugs\u003c\/h2\u003e\n\u003cul class=\"hdiy-features\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔒\u003c\/span\u003e \u003cspan\u003e\u003cstrong\u003eO-Ring Face Seal (ORFS) Design\u003c\/strong\u003e — The integrated O-ring seals at the port face for a positive, leak-free connection without relying on thread tape or pipe dope in most applications.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e \u003cspan\u003e\u003cstrong\u003eHex Head Drive\u003c\/strong\u003e — The six-sided head accepts a standard open-end or adjustable wrench, allowing controlled torque application and easy removal during maintenance — no special tools required.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e \u003cspan\u003e\u003cstrong\u003eSolid 304 Stainless Steel (A2)\u003c\/strong\u003e — Machined from solid bar stock, not cast or hollow. 304 SS resists rust, oxidation, and mild chemical exposure, making it suitable for both indoor and outdoor pipe plug applications.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e \u003cspan\u003e\u003cstrong\u003eWide Size Range — 1\/8\" to 2\"\u003c\/strong\u003e — Covers the most common pipe thread sizes used in US and international plumbing, hydraulic, and pneumatic systems, from small instrument ports up to large 2\" main line plugs.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e \u003cspan\u003e\u003cstrong\u003eDual Thread Standard — NPT \u0026amp; PT\u003c\/strong\u003e — Both NPT (National Pipe Taper) and PT (BSP Taper) variants are stocked, so you can match the correct thread standard to your equipment without adapters or modifications.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🏭\u003c\/span\u003e \u003cspan\u003e\u003cstrong\u003eMale Threaded, External Hex Body\u003c\/strong\u003e — The male thread engages directly into a female-threaded port or fitting, while the external hex body sits flush or slightly proud for a clean, professional installation in manifolds, valve blocks, and pipe assemblies.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- ④ TECHNICAL SPECIFICATIONS --\u003e\n\u003ch2\u003e📐 Technical Specifications — Hex Head Male Pipe Plug\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003eHex Head Male Pipe Plug with O-Ring Face Seal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eSolid 304 Stainless Steel (A2 Grade)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThread Standards\u003c\/th\u003e\n\u003ctd\u003eNPT (National Pipe Taper) and PT (BSP Taper \/ BSPT)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Sizes\u003c\/th\u003e\n\u003ctd\u003e1\/8\", 1\/4\", 3\/8\", 1\/2\", 3\/4\", 1\", 1-1\/4\", 1-1\/2\", 2\" (both NPT and PT)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThread OD Range\u003c\/th\u003e\n\u003ctd\u003eApprox. 10.3mm (1\/8\") to 60.3mm (2\") — varies by nominal size\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDrive Style\u003c\/th\u003e\n\u003ctd\u003eExternal Hex Head (wrench-driven)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSeal Type\u003c\/th\u003e\n\u003ctd\u003eO-Ring Face Seal (ORFS)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eMill \/ Natural Stainless (no coating)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWorking Pressure\u003c\/th\u003e\n\u003ctd\u003eSee variant options — contact us to confirm for your size\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTemperature Range\u003c\/th\u003e\n\u003ctd\u003eGenerally suitable for -20°C to +200°C (-4°F to +392°F); confirm for your application\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003e1 pc or 2 pcs (select via Amount option)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCountry of Origin\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-note\"\u003e\n\u003cspan class=\"hdiy-note-icon\"\u003e⚠️\u003c\/span\u003e \u003cstrong\u003eConfirm before ordering:\u003c\/strong\u003e NPT and PT (BSP) threads are not interchangeable. Measure your port or check your equipment manual to identify the correct thread standard and nominal size. When in doubt, contact us — we're happy to help you select the right plug.\u003c\/div\u003e\n\u003c!-- ⑤ FAQ --\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I choose the right pipe plug size?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMatch the plug size to your port's thread size — not the outer diameter of the fitting body. For example, a 1\/2\" NPT port requires a 1\/2\" NPT plug. If you're unsure, measure the thread OD: a 1\/2\" NPT thread is typically about 0.840\" (21.3mm) in outer diameter. Always verify the thread standard (NPT vs PT\/BSP) before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between NPT and PT (BSP) threads?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eNPT (National Pipe Taper) is the US standard with a 60° thread angle. PT (Pipe Taper, also called BSPT) is the metric\/international standard with a 55° thread angle. They are \u003cstrong\u003enot interchangeable\u003c\/strong\u003e — always confirm which standard your equipment uses before selecting a plug.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong is a 304 stainless steel pipe plug?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003e304 stainless steel (A2) generally has a tensile strength of around 515 MPa (75,000 psi) and a yield strength of approximately 205 MPa (30,000 psi). These plugs are typically rated for working pressures up to several thousand PSI depending on size — contact us to confirm pressure ratings for your specific application.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan these pipe plugs be used outdoors or in wet environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. 304 stainless steel offers good corrosion resistance in most outdoor and wet environments. It performs well against water, mild chemicals, and atmospheric exposure. For highly chlorinated or marine\/saltwater environments, 316 stainless steel is generally recommended instead.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes the O-ring provide a leak-free seal without thread sealant?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe O-ring face seal (ORFS) design creates a positive, leak-free seal at the face of the port rather than relying solely on thread engagement. In most cases, no additional thread tape or sealant is needed — however, for critical pressure applications, consult your system specifications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat tool do I need to install a hex head pipe plug?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eA standard open-end wrench or adjustable wrench sized to the hex head is all you need. The hex head design allows for firm torque application without slipping. Do not over-tighten — follow the torque specifications for your thread size and system pressure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these plugs suitable for hydraulic or pneumatic systems?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese hex head pipe plugs with O-ring face seal are commonly used in hydraulic and pneumatic systems to cap off unused ports. The O-ring seal helps prevent fluid or air leakage. Always verify the pressure rating is compatible with your system before installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat sizes are available and what do the size designations mean?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eAvailable sizes range from 1\/8\" to 2\" in both NPT and PT thread standards. The size designation refers to the nominal pipe thread size, not the actual measured diameter. For reference: 1\/8\" NPT has a thread OD of approximately 0.405\" (10.3mm); 2\" NPT has a thread OD of approximately 2.375\" (60.3mm).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c!-- ⑥ CTA BAR --\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your \u003cstrong\u003ethread size and quantity\u003c\/strong\u003e above, then add to cart — ships from our US warehouse.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"PT1\u00268 \/ 2pcs","offer_id":52336684040466,"sku":"WZYJSSGYJS02515x1","price":4.98,"currency_code":"USD","in_stock":true},{"title":"PT1\u00264 \/ 2pcs","offer_id":52336684073234,"sku":"WZYJSSGYJS02516x1","price":5.14,"currency_code":"USD","in_stock":true},{"title":"PT3\u00268 \/ 1pcs","offer_id":52336684106002,"sku":"WZYJSSGYJS02517x1","price":5.03,"currency_code":"USD","in_stock":true},{"title":"PT1\u00262 \/ 1pcs","offer_id":52336684138770,"sku":"WZYJSSGYJS02518x1","price":7.14,"currency_code":"USD","in_stock":true},{"title":"PT3\u00264 \/ 1pcs","offer_id":52336684171538,"sku":"WZYJSSGYJS02519x1","price":11.53,"currency_code":"USD","in_stock":true},{"title":"PT1\" \/ 1pcs","offer_id":52336684204306,"sku":"WZYJSSGYJS02520x1","price":18.16,"currency_code":"USD","in_stock":true},{"title":"PT1-1\u00264 \/ 1pcs","offer_id":52336684237074,"sku":"WZYJSSGYJS02521x1","price":32.68,"currency_code":"USD","in_stock":true},{"title":"PT1-1\u00262 \/ 1pcs","offer_id":52336684269842,"sku":"WZYJSSGYJS02522x1","price":44.99,"currency_code":"USD","in_stock":true},{"title":"PT2\" \/ 1pcs","offer_id":52336684302610,"sku":"WZYJSSGYJS02523x1","price":74.66,"currency_code":"USD","in_stock":true},{"title":"NPT1\u00268 \/ 2pcs","offer_id":52336684335378,"sku":"WZYJSSGYJS02524x1","price":4.98,"currency_code":"USD","in_stock":true},{"title":"NPT1\u00264 \/ 2pcs","offer_id":52336684368146,"sku":"WZYJSSGYJS02525x1","price":5.14,"currency_code":"USD","in_stock":true},{"title":"NPT3\u00268 \/ 1pcs","offer_id":52336684400914,"sku":"WZYJSSGYJS02526x1","price":5.03,"currency_code":"USD","in_stock":true},{"title":"NPT1\u00262 \/ 1pcs","offer_id":52336684433682,"sku":"WZYJSSGYJS02527x1","price":7.14,"currency_code":"USD","in_stock":true},{"title":"NPT3\u00264 \/ 1pcs","offer_id":52336684466450,"sku":"WZYJSSGYJS02528x1","price":11.53,"currency_code":"USD","in_stock":true},{"title":"NPT1\" \/ 1pcs","offer_id":52336684499218,"sku":"WZYJSSGYJS02529x1","price":18.16,"currency_code":"USD","in_stock":true},{"title":"NPT1-1\u00264 \/ 1pcs","offer_id":52336684531986,"sku":"WZYJSSGYJS02530x1","price":32.68,"currency_code":"USD","in_stock":true},{"title":"NPT1-1\u00262 \/ 1pcs","offer_id":52336684564754,"sku":"WZYJSSGYJS02531x1","price":44.99,"currency_code":"USD","in_stock":true},{"title":"NPT2\" \/ 1pcs","offer_id":52336684597522,"sku":"WZYJSSGYJS02532x1","price":74.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture1of5_f45f6d45-ae31-4422-8797-32159ef14647.jpg?v=1781081298","url":"https:\/\/homediyer.com\/products\/hex-head-pipe-plug-male-o-ring-npt-pt-stainless-steel-304","provider":"HomeDIYer","version":"1.0","type":"link"}