{"product_id":"value-collection-zmscs70238-silicone-o-ring-dash-238-5-pack","title":"Value Collection ZMSCS70238 Silicone O-ring Dash 238 5-pack","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION ZMSCS70238 is a Dash 238 silicone O-ring sold in a pack of five, designed for static and dynamic sealing applications across a broad temperature range. With a 3.5-inch inside diameter, 3.75-inch outside diameter, and 0.125-inch wall thickness, this O-ring fits standard Dash 238 grooves without modification. The round cross section provides consistent compression and sealing contact. Silicone compound delivers reliable performance from -80 degrees F to 450 degrees F, making it a practical choice where wide thermal cycling, dry heat resistance, or ozone and weather exposure are primary concerns. Hardness is rated at 70 Shore A, classified as hard.\u003c\/p\u003e\n\u003cp\u003eThis O-ring is suited for HVAC equipment seals, plumbing fittings, pump housings, and general mechanical assemblies where silicone is the specified compound. It is compatible with oils, chemicals, and solvents within its rated limits, though oil resistance is limited relative to other silicone grades. Technicians and maintenance professionals working on heating, cooling, and fluid-handling systems commonly specify Dash 238 O-rings for cover plate gaskets, end caps, and port seals. Each order ships as a pack of five pieces.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSilicone compound rated from -80 degrees F to 450 degrees F for wide thermal range service\u003c\/li\u003e\n  \u003cli\u003eRound cross section with 3.5-inch ID and 3.75-inch OD to standard Dash 238 dimensions\u003c\/li\u003e\n  \u003cli\u003e70 Shore A hardness (hard rating) for firm compression seal\u003c\/li\u003e\n  \u003cli\u003eResistant to weather and ozone degradation\u003c\/li\u003e\n  \u003cli\u003eCompatible with oils, chemicals, and solvents within rated limits; limited oil resistance noted\u003c\/li\u003e\n  \u003cli\u003eSold in a pack of five for service inventory and replacement stock\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard Dash 238 O-ring replacement for any groove or port machined to Dash 238 specifications requiring a silicone compound seal.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003ePower down or depressurize the system before removing or installing any O-ring seal. Clean the seating groove of debris, old sealant, and residual compound before installing the replacement. Inspect the groove dimensions to confirm they match Dash 238 specifications prior to installation. O-ring installation is a common task for licensed HVAC technicians, plumbers, and mechanical service professionals working under applicable codes.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Silicone\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDash Number\u003c\/strong\u003e: 238\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 3.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 3.75 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 0.125 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCross Section Shape\u003c\/strong\u003e: Round\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\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColor\u003c\/strong\u003e: White\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\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: ZMSCS70238\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51716313874738,"sku":"ZMSCS70238","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/c17bf5297c09332d18450d520838e9c2.jpg?v=1788524226","url":"https:\/\/voomisupply.com\/products\/value-collection-zmscs70238-silicone-o-ring-dash-238-5-pack","provider":"Voomi Supply","version":"1.0","type":"link"}