{"product_id":"value-collection-zmsch70248-o-ring-dash-248-nitrile-70a","title":"Value Collection ZMSCH70248 O-ring Dash 248 Nitrile 70A","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION ZMSCH70248 is a Dash 248 Buna-N O-ring designed for static and dynamic sealing applications across HVAC, plumbing, and fluid-handling systems. It measures 4.75 inches inside diameter and 5.0 inches outside diameter with a 0.125-inch round cross section. Manufactured from nitrile butadiene rubber (Buna-N) at a 70 Shore A hardness rating, this O-ring provides reliable sealing performance in systems that handle petroleum-based fluids, oils, and fuels. Installation is performed by HVAC technicians, plumbers, and mechanical service professionals working on pumps, valves, fittings, and compressor assemblies.\u003c\/p\u003e\n\u003cp\u003eThis O-ring is suited for residential and commercial applications involving petroleum products, hydraulic fluids, and similar media. The Dash 248 sizing is a standard AN\/MS designation, making it a common replacement in a wide range of mechanical sealing points. It is appropriate for systems operating within a temperature range of -40 degrees F to 250 degrees F, covering most standard HVAC, refrigeration-adjacent, and fluid-system service environments. Each package contains 25 O-rings, with a minimum order quantity of 1.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eBuna-N (nitrile butadiene rubber) construction offers excellent resistance to petroleum products, oils, and fuels\u003c\/li\u003e\n  \u003cli\u003e70 Shore A hardness provides a firm, reliable compression seal with good compression set resistance\u003c\/li\u003e\n  \u003cli\u003eRound cross-section profile seats consistently in standard O-ring grooves\u003c\/li\u003e\n  \u003cli\u003eOperating temperature range of -40 degrees F to 250 degrees F suits most HVAC and fluid-system service conditions\u003c\/li\u003e\n  \u003cli\u003eMeets SAE and MIL-Spec standards\u003c\/li\u003e\n  \u003cli\u003eBlack color; package quantity of 25 per unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard Dash 248 O-ring replacement for use with petroleum products and compatible media in mechanical sealing applications. Compatible materials include petroleum-based fluids and oils. Not recommended for exposure to ozone, direct sunlight during storage, or environments near motors or electrical equipment that may generate ozone.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eO-ring replacement is typically performed by licensed HVAC technicians or plumbers during valve, pump, or fitting service. Always depressurize and isolate the system before removing any sealing components. Lubricate the O-ring with a compatible fluid or O-ring lubricant before seating to prevent twisting or pinching during installation. Inspect the groove for scoring or corrosion that could compromise the seal before fitting the new O-ring.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 4.75 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 5.0 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness (Cross Section)\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\u003eDash Number\u003c\/strong\u003e: 248\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Buna-N (Nitrile Butadiene Rubber)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHardness\u003c\/strong\u003e: 70 Shore A (Hard)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColor\u003c\/strong\u003e: Black\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Working Temperature\u003c\/strong\u003e: -40 degrees F\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Working Temperature\u003c\/strong\u003e: 250 degrees F\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible Media\u003c\/strong\u003e: Petroleum Products\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: SAE, MIL-Spec\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: 25\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: ZMSCH70248\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51721460842802,"sku":"ZMSCH70248","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/c6d92cb0522ea78022a30a6c423ee29d.jpg?v=1788577676","url":"https:\/\/voomisupply.com\/products\/value-collection-zmsch70248-o-ring-dash-248-nitrile-70a","provider":"Voomi Supply","version":"1.0","type":"link"}