{"product_id":"n-a-4381001820-blind-flange-1-in-nominal-pipe-size-316-316-l-stainless-steel-class-150","title":"4381001820 – Blind Flange, 1 in Nominal Pipe Size, 316\/316 L Stainless Steel, Class 150, Raised Face","description":"\u003cdiv class=\"nbs-product-description\"\u003e\n\u003cp class=\"nbs-intro\"\u003eOrder the 4381001820 Blind Flange from National Boiler Supply. Call our order desk at 850-565-3492 for a formal quote or a part number cross-check.\u003c\/p\u003e\n\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eIt provides a boltable, pressure-tight connection when used with gaskets and bolts. Made from 316\/316L stainless steel, it offers corrosion resistance and conforms to industry standard face and bolt pattern configurations for compatibility with other components.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBolt Circle Diameter: 3 1\/8 in, the measurement of the circle passing through the center of bolt holes, indicating flange compatibility.\u003c\/li\u003e\n\u003cli\u003eDiameter of the Bolt Hole: 5\/8 in, the size of the holes for bolts or studs.\u003c\/li\u003e\n\u003cli\u003eClass: Class 150, indicating the pressure rating for maximum working pressure.\u003c\/li\u003e\n\u003cli\u003eFlange Outside Diameter: 4 1\/4 in, the overall outer measurement across the flange.\u003c\/li\u003e\n\u003cli\u003eFlange Thickness: 1\/2 in, the thickness of the flange material.\u003c\/li\u003e\n\u003cli\u003eMaterial Grade: 316\/316L stainless steel, providing corrosion resistance and durability.\u003c\/li\u003e\n\u003cli\u003eNominal Pipe Size: 1 in, the standard size designation for pipe compatibility.\u003c\/li\u003e\n\u003cli\u003eNumber of Bolt Holes: 4, facilitating secure attachment to mating components.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv class=\"nbs-spec-wrap\" style=\"overflow-x:auto;-webkit-overflow-scrolling:touch;\"\u003e\u003ctable class=\"nbs-spec-table\" style=\"width:100%;max-width:100%;border-collapse:collapse;font-size:0.95em;\"\u003e\u003ctbody\u003e\u003ctr\u003e\n\u003cth scope=\"row\" style=\"text-align:left;padding:8px 10px;border:1px solid #d9dee5;background:#f4f6f9;width:38%;\"\u003eManufacturer Part Number\u003c\/th\u003e\n\u003ctd style=\"padding:8px 10px;border:1px solid #d9dee5;\"\u003e4381001820\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\u003cdiv class=\"nbs-b2b-callout\" style=\"border-left:4px solid #1F3A5F;background:#f4f6f9;padding:12px 16px;margin:18px 0 0;\"\u003e\n\u003cp style=\"margin:0 0 6px;\"\u003e\u003cstrong\u003eOEM Part Verification:\u003c\/strong\u003e Confirm part number 4381001820 against your equipment nameplate or parts list before ordering. Our order desk can cross-check it for you.\u003c\/p\u003e\n\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eOrder Desk Support:\u003c\/strong\u003e Call \u003ca href=\"tel:+18505653492\"\u003e850-565-3492\u003c\/a\u003e for formal quotes, lead times, and volume pricing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Generic","offers":[{"title":"Default Title","offer_id":43321020350558,"sku":"4381001820","price":43.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/Z3oL6uicpIx_b33c738b-2f28-4c36-b6f4-2e86272c1e30.jpg?v=1794519073","url":"https:\/\/nationalboilersupply.com\/products\/n-a-4381001820-blind-flange-1-in-nominal-pipe-size-316-316-l-stainless-steel-class-150","provider":"National Boiler Supply","version":"1.0","type":"link"}