{"product_id":"value-collection-zmscs70251-silicone-o-ring-dash-251-5pk","title":"Value Collection ZMSCS70251 Silicone O-ring Dash 251 5pk","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION ZMSCS70251 is a silicone O-ring sized to Dash 251 standards, with a 5.125-inch inside diameter, 5.375-inch outside diameter, and 0.125-inch cross-section thickness. This round cross-section ring is designed for static and dynamic sealing applications across HVAC, plumbing, and industrial equipment. Silicone compound provides a wide service temperature range, running from -80 degrees F up to 450 degrees F, making it suitable for high-heat and outdoor environments where standard rubber compounds fail. The durometer hardness rating is 70, placing it in the hard category for firm compression and reliable sealing under sustained load. Each package contains 5 rings.\u003c\/p\u003e\n\u003cp\u003eThis O-ring is well suited for residential and light commercial HVAC systems, plumbing assemblies, pool and spa equipment, and general mechanical joints where exposure to ozone, UV, or dry heat is a concern. The silicone material offers good weather and ozone resistance, though its oil resistance is limited. It is not FDA approved, so it is not intended for food-service or potable-water contact applications. Compatible with oils, chemicals, and solvents within the limits of the silicone compound. Installers working in high-temperature or outdoor environments typically specify this profile when standard EPDM or Buna-N rings are not appropriate.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eWide temperature range: -80 degrees F to 450 degrees F for high-heat and cold-weather service\u003c\/li\u003e\n  \u003cli\u003eDurometer hardness of 70 for firm, consistent compression seals\u003c\/li\u003e\n  \u003cli\u003eRound cross section conforms to Dash 251 sizing standard\u003c\/li\u003e\n  \u003cli\u003eGood resistance to ozone, UV, and dry heat\u003c\/li\u003e\n  \u003cli\u003eCompatible with oils, chemicals, and solvents within silicone service limits\u003c\/li\u003e\n  \u003cli\u003eSold in packs of 5 with a minimum order quantity of 1 pack\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or maintenance stock O-ring for mechanical assemblies requiring a Dash 251 silicone seal in grooves sized for a 5.125-inch ID and 0.125-inch cross section.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is typically performed by licensed HVAC technicians, plumbers, or mechanical maintenance personnel. Always depressurize and isolate the line or component before removing or installing an O-ring. Inspect the groove for burrs, scoring, or debris before seating the new ring. Avoid twisting the O-ring during installation, as torsion can cause premature seal failure under pressure.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 5.125 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 5.375 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 0.125 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDash Number\u003c\/strong\u003e: 251\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCross Section Shape\u003c\/strong\u003e: Round\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Silicone\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColor\u003c\/strong\u003e: White\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHardness\u003c\/strong\u003e: 70\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHardness Rating\u003c\/strong\u003e: Hard\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Working Temperature\u003c\/strong\u003e: -80 degrees F\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Working Temperature\u003c\/strong\u003e: 450 degrees F\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible Media\u003c\/strong\u003e: Oils, Chemicals, Solvents\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFDA Approved\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 5\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.02 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31401503\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: VALUE COLLECTION\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: ZMSCS70251\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51722513088818,"sku":"ZMSCS70251","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d07c30dd8efcd500b8bb1759bdfbae86_3b481a83-d0d6-4fe0-8e85-f2b0bc30634c.jpg?v=1788592190","url":"https:\/\/voomisupply.com\/products\/value-collection-zmscs70251-silicone-o-ring-dash-251-5pk","provider":"Voomi Supply","version":"1.0","type":"link"}