{"product_id":"value-collection-zmsch70250-o-ring-dash-250-buna-n","title":"Value Collection ZMSCH70250 O-ring Dash 250 Buna-n","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION ZMSCH70250 is a Dash 250 Buna-N (Nitrile Butadiene Rubber) O-ring with a round cross section, designed for static and dynamic sealing applications across HVAC, plumbing, and fluid system service work. It measures 5 inches inside diameter, 5.25 inches outside diameter, and 0.125 inches thick. Rated at 70 Shore A hardness, this O-ring provides excellent resistance to petroleum-based fluids and compression set. It handles a working temperature range of -40 degrees F to 250 degrees F, making it suitable for a broad range of service environments encountered in trade work.\u003c\/p\u003e\u003cp\u003eThis O-ring is used in residential and commercial applications wherever a Dash 250 size is specified. Typical install scenarios include pump seals, valve bodies, pipe fittings, hydraulic connections, and fluid handling components that contact petroleum products or mineral oils. The Buna-N elastomer is the most widely used O-ring material in the trade due to its balance of chemical resistance, tear resistance, and abrasion resistance. Package quantity is 10 rings per package, with a minimum order of 1 package.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eBuna-N (Nitrile Butadiene Rubber) elastomer — the most widely used O-ring material in fluid sealing applications\u003c\/li\u003e\n\u003cli\u003eExcellent resistance to petroleum products, mineral oils, and hydraulic fluids\u003c\/li\u003e\n\u003cli\u003eRound cross section with 70 Shore A hardness rating for reliable compression set performance\u003c\/li\u003e\n\u003cli\u003eWide temperature range: -40 degrees F to 250 degrees F\u003c\/li\u003e\n\u003cli\u003eMeets SAE and MIL-Spec standards\u003c\/li\u003e\n\u003cli\u003eSold in packs of 10; minimum order quantity of 1 pack\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard Dash 250 O-ring replacement compatible with petroleum-product and mineral-oil fluid systems. Not recommended for use with ozone-generating environments, direct sunlight exposure, or applications requiring FDA-approved materials.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is typically performed by licensed plumbers, HVAC technicians, or fluid system mechanics as part of valve, pump, or fitting service. Always depressurize and drain the system before replacing O-rings. Inspect the seating groove for damage or debris before installing the new O-ring. Avoid twisting or overstretching the O-ring during installation; use a compatible petroleum-based lubricant to ease seating where the application permits.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 5.25 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: 250\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\u003eColor\u003c\/strong\u003e: Black\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 Fluids\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: 10\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: ZMSCH70250\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51717172330802,"sku":"ZMSCH70250","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/eee9885f4f7473b9e80e4f8dfa42fc95.jpg?v=1788536579","url":"https:\/\/voomisupply.com\/products\/value-collection-zmsch70250-o-ring-dash-250-buna-n","provider":"Voomi Supply","version":"1.0","type":"link"}