{"product_id":"value-collection-zmsch70320-o-ring-dash-320-buna-n-70a","title":"Value Collection ZMSCH70320 O-ring Dash 320 Buna-n 70A","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION ZMSCH70320 is a Dash 320 Buna-N (Nitrile Butadiene Rubber) O-ring with a round cross section, sized at 1.125 inches inside diameter, 1.5 inches outside diameter, and 0.1875 inches thick. Rated at 70 Shore A hardness, this O-ring delivers reliable sealing performance in hydraulic, pneumatic, plumbing, and HVAC applications where contact with petroleum-based fluids is expected. It carries SAE and MIL-Spec standards compliance. HVAC technicians, plumbers, and mechanical contractors use this O-ring as a sealing element in valves, fittings, pumps, and fluid-handling assemblies. Sold in a package quantity of 50.\u003c\/p\u003e\n\u003cp\u003eThis O-ring is well suited for residential and light commercial systems where petroleum product exposure is routine, including refrigeration oil circuits, hydraulic line connections, and fuel-handling components. The Buna-N compound is the most widely used O-ring elastomer in the trade, chosen for its broad chemical compatibility, solid compression set resistance, and durability under cyclic loading. It performs across a temperature range of -40 degrees F to 250 degrees F, making it appropriate for the majority of standard mechanical service environments encountered in plumbing and HVAC work.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eBuna-N (Nitrile Butadiene Rubber) compound with excellent resistance to petroleum products and hydraulic fluids\u003c\/li\u003e\n  \u003cli\u003e70 Shore A hardness rating for reliable sealing under compression in standard-duty applications\u003c\/li\u003e\n  \u003cli\u003eRound cross section, 0.1875 inches thick, conforming to Dash 320 dimensional standard\u003c\/li\u003e\n  \u003cli\u003eOperating temperature range of -40 degrees F to 250 degrees F\u003c\/li\u003e\n  \u003cli\u003eMeets SAE and MIL-Spec standards\u003c\/li\u003e\n  \u003cli\u003ePackage quantity of 50 units; minimum order quantity of 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eCompatible with petroleum products and petroleum-based fluids. Designed as an OEM-style replacement or service O-ring for valves, fittings, pumps, and fluid-handling assemblies requiring a Dash 320 Buna-N seal. Should not be used in direct contact with ozone-generating equipment, strong oxidizers, or in direct sunlight storage conditions.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eLicensed plumbers, HVAC technicians, and mechanical contractors typically install O-rings of this type during valve service, fitting replacement, or pump overhaul. Shut off all fluid supply and relieve system pressure completely before removing the old O-ring or installing the replacement. Lightly lubricate the O-ring with a compatible fluid or O-ring lubricant before seating to prevent tearing during installation. Avoid storing unused O-rings near motors, electrical equipment, or in direct sunlight, as ozone and UV exposure degrade Buna-N compounds over time.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Buna-N (Nitrile Butadiene Rubber)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDash Number\u003c\/strong\u003e: 320\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 1.125 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 1.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 0.1875 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: -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\u003eColor\u003c\/strong\u003e: Black\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: 50\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: ZMSCH70320\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51710257496370,"sku":"ZMSCH70320","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/0cd9cf9fbcc2a87af112724c703bf390.jpg?v=1788464862","url":"https:\/\/voomisupply.com\/products\/value-collection-zmsch70320-o-ring-dash-320-buna-n-70a","provider":"Voomi Supply","version":"1.0","type":"link"}