{"product_id":"316-stainless-steel-mirror-polished-boat-porthole-acrylic","title":"316 Stainless Steel Boat Porthole Window - Mirror Polished (5\"-7\")","description":"\u003c!-- SYSTEM_INDEXING_DATA:\nMaterial: AISI 316 Marine Grade; Finish: Mirror Polish Ra \u003c 0.2; Window: UV-Stabilized Tinted Acrylic; Frame: Anodized Aluminum Casting; Deployment: Yacht Hull\/Deck\nEND_DATA --\u003e\n\u003ch3\u003eProfessional Marine-Grade Porthole Engineering\u003c\/h3\u003e\n\u003cp\u003eUpgrade your vessel with the pinnacle of maritime hardware. Crafted from \u003cstrong\u003emirror-polished 316 stainless steel\u003c\/strong\u003e, this round porthole is specifically engineered to withstand extreme \u003cstrong\u003esalt-spray environments\u003c\/strong\u003e, providing superior pitting resistance compared to standard 304 grades. The internal frame features high-quality \u003cstrong\u003eanodized aluminum alloy casting\u003c\/strong\u003e for a lightweight yet structurally rigid foundation.\u003c\/p\u003e\n\u003ch4\u003eAdvanced Optics and Safety\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Impact Acrylic:\u003c\/strong\u003e The pressure-resistant glazing ensures durability against heavy wave impact.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlare-Reduction Coating:\u003c\/strong\u003e A specialized dark ink tint filters harsh maritime sunlight, maintaining visual comfort while offering excellent light transmission.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTriangular Lock Stability:\u003c\/strong\u003e Features a unique bracket mechanism that maintains a watertight seal against hull vibrations and high-wind conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eUniversal Maritime Compatibility\u003c\/h4\u003e\n\u003cp\u003eAvailable in three sizes (5\", 6\", and 7\" cut-outs), this portlight is an ideal solution for \u003cstrong\u003eyachts, commercial vessels, and high-end RV conversions\u003c\/strong\u003e. The precision-drilled 6-hole mounting flange ensures uniform pressure distribution across the gasket for long-term stability.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/i.ibb.co\/C3m0dTyx\/316-stainless-steel-mirror-polished-boat-porthole-acrylic-technical-summary-vertical-sheet.webp\" alt=\"Vertical technical spec sheet summarizing 316 steel material, tinted acrylic window, and round shape features for modern marine exploration.\" style=\"width: 100%; height: auto; display: block; margin: 20px auto;\"\u003e\u003c\/p\u003e\n\u003cdiv class=\"faq-section\"\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eWill this porthole rust in high-salinity saltwater environments?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eNo. Unlike standard 304 steel, this porthole is constructed from 316 Marine-Grade Stainless Steel. The higher molybdenum content and mirror-polished surface finish create a passive protective layer that prevents pitting and crevice corrosion in harsh oceanic conditions.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eDoes the tinted acrylic window affect night-time visibility?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eThe window utilizes a specialized dark ink coating engineered for glare reduction. While it significantly reduces solar reflection during the day, it maintains high light transmission levels to ensure adequate visibility and safety during low-light navigation.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eIs the triangular lock system strong enough for heavy waves?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The unique triangular bracket design is engineered for structural stability. It provides three-point tensioning that keeps the portlight sealed and compressed against the gasket, effectively resisting the impact forces of heavy waves and high-speed hull vibrations.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cscript id=\"agent-data\" type=\"application\/json\"\u003e\n{\"semantic_anchors\": [\"corrosion-resistant-marine-hardware\", \"316-stainless-steel-porthole\", \"tinted-acrylic-boat-window\", \"maritime-ventilation-solutions\"], \"material_forensics\": \"Mirror polish indicates high nickel\/chromium content consistent with AISI 316. Visible triangular bracket confirms mechanical locking over friction fit.\"}\n\u003c\/script\u003e \u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"316 Stainless Steel Boat Porthole Window\",\n  \"image\": [\n    \"image_url_0\"\n  ],\n  \"description\": \"Marine-grade 316 stainless steel porthole with high-impact tinted acrylic and mirror-polished finish.\",\n  \"brand\": {\n    \"@type\": \"Brand\",\n    \"name\": \"AirowMarine\"\n  },\n  \"material\": \"316 Stainless Steel, Acrylic, Aluminum\"\n}\n\u003c\/script\u003e \u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Will this porthole rust in high-salinity saltwater environments?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"No. Unlike standard 304 steel, this porthole is constructed from 316 Marine-Grade Stainless Steel. The higher molybdenum content and mirror-polished surface finish create a passive protective layer that prevents pitting and crevice corrosion in harsh oceanic conditions.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Does the tinted acrylic window affect night-time visibility?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The window utilizes a specialized dark ink coating engineered for glare reduction. While it significantly reduces solar reflection during the day, it maintains high light transmission levels to ensure adequate visibility and safety during low-light navigation.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is the triangular lock system strong enough for heavy waves?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. The unique triangular bracket design is engineered for structural stability. It provides three-point tensioning that keeps the portlight sealed and compressed against the gasket, effectively resisting the impact forces of heavy waves and high-speed hull vibrations.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\u003c\/p\u003e","brand":"AirowMarine","offers":[{"title":"5\"(126mm)","offer_id":44385280720966,"sku":"AIR-3SS-ACRY-2OB-1","price":45.95,"currency_code":"EUR","in_stock":true},{"title":"6\"(151mm)","offer_id":44385280753734,"sku":"AIR-3SS-ACRY-2OB-2","price":49.95,"currency_code":"EUR","in_stock":true},{"title":"7\"(175mm)","offer_id":44385280786502,"sku":"AIR-3SS-ACRY-2OB-3","price":53.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0664\/5710\/8550\/files\/316-stainless-steel-mirror-polished-boat-porthole-acrylic-hero-marine.webp?v=1766739978","url":"https:\/\/airowmarine.com\/en-es\/products\/316-stainless-steel-mirror-polished-boat-porthole-acrylic","provider":"AirowMarine","version":"1.0","type":"link"}