{"product_id":"value-collection-zmscs70345-silicone-o-ring-dash-345-5-pack","title":"Value Collection ZMSCS70345 Silicone O-ring Dash 345 5-pack","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION ZMSCS70345 is a round-cross-section silicone O-ring designed for static and dynamic sealing applications across HVAC, plumbing, and industrial fluid systems. It measures 4 inches inside diameter, 4-3\/8 inches outside diameter, and 3\/16 inches thick, conforming to Dash 345 dimensions. Rated for a working temperature range of -80 degrees F to 450 degrees F, this O-ring is well suited for systems that cycle through extreme heat or cold. The silicone compound provides good dry heat resistance, weather resistance, and ozone resistance. Each package contains 5 O-rings. Hardness is rated at 70 Shore A, placing it in the hard hardness category.\u003c\/p\u003e\u003cp\u003eThis O-ring is used in residential and commercial HVAC equipment, plumbing assemblies, pump housings, and general industrial applications where a reliable seal against oils, chemicals, and solvents is required. It is particularly appropriate for installations demanding a wide service temperature range, such as high-efficiency furnace flue connections, water treatment components, and chemical handling systems. The white silicone construction is compatible with a broad range of fluid media, though oil resistance is limited and should be evaluated against the specific application before installation.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eDash 345 standard dimensions: 4 inches ID, 4-3\/8 inches OD, 3\/16 inches thick\u003c\/li\u003e\n\u003cli\u003eWide service temperature range: -80 degrees F to 450 degrees F\u003c\/li\u003e\n\u003cli\u003e70 Shore A hardness for firm, consistent sealing compression\u003c\/li\u003e\n\u003cli\u003eGood resistance to dry heat, weather, and ozone\u003c\/li\u003e\n\u003cli\u003eCompatible with oils, chemicals, and solvents — note limited oil resistance\u003c\/li\u003e\n\u003cli\u003eSold in a pack of 5 to support stocking and repeat service calls\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard Dash 345 replacement O-ring for any application requiring a 4-inch ID silicone seal with a round cross section and 3\/16-inch thickness.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eO-ring installation should be performed by a qualified technician familiar with the host system — HVAC, plumbing, or mechanical as applicable. Shut down and de-pressurize the system completely before removing the existing O-ring. Inspect the groove and mating surfaces for damage, scoring, or debris before seating the replacement. Do not overstretch or twist the O-ring during installation, as this can compromise the seal integrity.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 4-3\/8 inches (4.375 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 3\/16 inches (0.1875 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDash Number\u003c\/strong\u003e: 345\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 Shore A (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 (limited oil resistance)\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\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: ZMSCS70345\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51717855117618,"sku":"ZMSCS70345","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/fcaff94809ad3e55f4646048f411d9b6.jpg?v=1788546785","url":"https:\/\/voomisupply.com\/products\/value-collection-zmscs70345-silicone-o-ring-dash-345-5-pack","provider":"Voomi Supply","version":"1.0","type":"link"}