{"product_id":"value-collection-zmsch70442-o-ring-dash-442-nbr-70a","title":"Value Collection ZMSCH70442 O-ring Dash 442 Nbr 70A","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION ZMSCH70442 is a Dash 442 O-ring manufactured from Nitrile Butadiene Rubber (Buna-N), the most widely used elastomer in sealing applications. It features a 7.25-inch inside diameter, 7.75-inch outside diameter, and a 0.25-inch thickness with a round cross section. Rated at 70 Shore A hardness, this O-ring delivers excellent compression set resistance along with strong tear and abrasion resistance. It is well suited for use in fluid and pneumatic systems where petroleum-based media is present. Licensed HVAC technicians, plumbers, and mechanical service professionals install this part as a replacement or maintenance seal in large-bore fittings and equipment flanges.\u003c\/p\u003e\u003cp\u003eThis O-ring is designed for applications involving petroleum products, hydraulic fluids, and similar media in residential and commercial mechanical systems. Its operating temperature range of -40 degrees F to 250 degrees F makes it appropriate for a broad range of indoor and outdoor service environments. Typical install scenarios include large-diameter pipe flanges, pump housings, valve bodies, and heat exchanger connections where a Dash 442 size is specified. The package contains 2 O-rings per unit, which supports service kits and back-stock applications. It conforms to SAE and MIL-Spec standards.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eBuna-N (Nitrile Butadiene Rubber) construction with excellent resistance to petroleum-based fluids\u003c\/li\u003e\n\u003cli\u003eDash 442 standard sizing: 7.25 inches ID, 7.75 inches OD, 0.25 inches thick\u003c\/li\u003e\n\u003cli\u003e70 Shore A hardness rating for reliable sealing under compression\u003c\/li\u003e\n\u003cli\u003eOperating range from -40 degrees F to 250 degrees F\u003c\/li\u003e\n\u003cli\u003eRound cross section for consistent seating in standard O-ring grooves\u003c\/li\u003e\n\u003cli\u003eConforms to SAE and MIL-Spec standards; sold in packages of 2\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard Dash 442 replacement O-ring for any application specifying a 7.25-inch ID by 7.75-inch OD by 0.25-inch round cross section Buna-N seal compatible with petroleum products.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by licensed plumbers, HVAC technicians, or qualified mechanical service professionals. Shut off and depressurize the system completely before removing the old O-ring or seating the replacement. Lightly lubricate the O-ring with a compatible fluid or assembly lubricant before installation to prevent tearing during seating. Do not store Buna-N O-rings in direct sunlight or near motors and electrical equipment that may generate ozone, as this degrades the elastomer over time.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 7.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 7.75 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDash Number\u003c\/strong\u003e: 442\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: 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\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\u003eColor\u003c\/strong\u003e: Black\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: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.02 pounds\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: ZMSCH70442\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51699337363762,"sku":"ZMSCH70442","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d87f7b165967964f269e12891e362fbf.jpg?v=1788375128","url":"https:\/\/voomisupply.com\/products\/value-collection-zmsch70442-o-ring-dash-442-nbr-70a","provider":"Voomi Supply","version":"1.0","type":"link"}