{"product_id":"brass-threaded-sealing-plug-flat-sided-head-port-closure","title":"Brass Threaded Sealing Plug – Flat-Sided Head, 19–21mm","description":"\n\u003ch2\u003eBrass Threaded Sealing Plug with Flat-Sided Drive Head\u003c\/h2\u003e\n\u003cp\u003eKeep your marine hardware systems neat and secure with this purpose-built \u003cstrong\u003eBrass Threaded Sealing Plug\u003c\/strong\u003e. Engineered for screw-in port closure during routine maintenance, this compact fitting covers exposed threaded openings and keeps your repair workflow orderly — whether you're working dockside or at the workshop bench.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePurpose-Built Port Sealing:\u003c\/strong\u003e Designed specifically for screw-in port closure on marine hardware, helping cover exposed threaded openings and support tidy, efficient repair work.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlat-Sided Drive Head:\u003c\/strong\u003e The flat-sided top provides a secure grip area for your tools, reducing slipping during installation or removal — ideal for repeated handling in routine service tasks.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSolid Brass Construction:\u003c\/strong\u003e The threaded brass body is built for practical maintenance use in damp work environments, delivering durability suited to marine and mechanical applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVersatile Sealing Application:\u003c\/strong\u003e Suitable for sealing, plugging, and controlling leaks at threaded ports on marine hardware and related mechanical interfaces — a reliable choice for repair benches, onboard spare kits, and workshop planning.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlexible Quantity Options:\u003c\/strong\u003e Available in a single-plug or two-plug pack so you can stock up based on your maintenance needs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Brass\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Square Threaded Sealing Plug\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplicable Calibers:\u003c\/strong\u003e 19–21mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Marine hardware port sealing, mechanical interface closure, replacement \u0026amp; routine maintenance\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Made in China\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePackage Includes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1× Square Threaded Sealing Plug \u003cstrong\u003eOR\u003c\/strong\u003e 2× Square Threaded Sealing Plugs (select your preferred quantity)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eImportant Notes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003ePlease allow a 1–2 cm variance due to manual measurement. Confirm sizing before ordering.\u003c\/li\u003e\n  \u003cli\u003eColors may vary slightly between monitors and the actual product.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/hand-power-tools\" target=\"_blank\" rel=\"noopener\"\u003eOSHA guidance on hand and power tools\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What thread size is this brass sealing plug compatible with?\u003c\/h4\u003e\n\u003cp\u003eA: This brass threaded sealing plug is designed for applicable calibers of 19–21mm, making it suitable for a range of standard marine hardware and mechanical threaded ports within that size range. Always verify your port diameter before purchasing.\u003c\/p\u003e\n\u003ch4\u003eQ: Is this sealing plug suitable for use in wet or marine environments?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The brass construction is well-suited to damp and marine work environments, providing a practical and durable closure for threaded ports on boat hardware systems and related mechanical interfaces during maintenance and repair tasks.\u003c\/p\u003e\n\u003ch4\u003eQ: Can I use this plug as a spare part kept onboard?\u003c\/h4\u003e\n\u003cp\u003eA: Absolutely. Its compact size and straightforward screw-in design make it an excellent addition to an onboard spare kit or workshop maintenance supply, ensuring you have a reliable port closure option ready whenever routine service calls for it.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What thread size is this brass sealing plug compatible with?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This brass threaded sealing plug is designed for applicable calibers of 19–21mm, making it suitable for a range of standard marine hardware and mechanical threaded ports within that size range. Always verify your port diameter before purchasing.\"}}, {\"@type\": \"Question\", \"name\": \"Is this sealing plug suitable for use in wet or marine environments?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. 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Its compact size and straightforward screw-in design make it an excellent addition to an onboard spare kit or workshop maintenance supply, ensuring you have a reliable port closure option ready whenever routine service calls for it.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/0dwbi8-fa.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Home page\", \"item\": \"https:\/\/0dwbi8-fa.myshopify.com\/collections\/frontpage\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"Brass Threaded Sealing Plug – Flat-Sided Head, 19–21mm\", \"item\": \"https:\/\/0dwbi8-fa.myshopify.com\/products\/brass-threaded-sealing-plug-flat-sided-head-port-closure\"}]}\u003c\/script\u003e","brand":"Quake","offers":[{"title":"1 piece \/ CN","offer_id":50290040963299,"sku":"14:771#1 piece;200007763:201441035","price":7.14,"currency_code":"USD","in_stock":true},{"title":"2 pieces \/ CN","offer_id":50290040996067,"sku":"14:1254#2 pieces;200007763:201441035","price":14.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/9439\/1523\/files\/Scd78e0fa38b444eb9b9b5dab42d7bb7fb.webp?v=1790357233","url":"https:\/\/quakegoods.com\/products\/brass-threaded-sealing-plug-flat-sided-head-port-closure","provider":"Quake","version":"1.0","type":"link"}