{"product_id":"value-collection-zmsch70143-o-ring-dash-143-buna-n","title":"Value Collection ZMSCH70143 O-ring Dash 143 Buna-n","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION ZMSCH70143 is a Dash 143 nitrile butadiene rubber (Buna-N) O-ring designed for static and dynamic sealing applications across plumbing, HVAC, hydraulic, and fluid-handling systems. It measures 2.438 inches inside diameter, 2.625 inches outside diameter, and 0.094 inches thick with a round cross section. The 70-durometer hardness rating delivers firm compression set resistance alongside solid tear and abrasion resistance. Rated for service from -40 degrees F to 250 degrees F, this O-ring performs reliably across a wide temperature range in petroleum-based fluid environments. Licensed trades and maintenance technicians install this type of seal during equipment overhaul, valve service, and pump repair work.\u003c\/p\u003e\u003cp\u003eThis O-ring is suited for residential and commercial applications wherever a Dash 143 standard seal is specified. Typical use cases include pump housings, valve bodies, fittings, and fluid-system components that contact petroleum-based media. Buna-N is the most widely used O-ring elastomer in the trades because of its broad compatibility with petroleum products, hydraulic oils, and fuels. This part ships in a package quantity of 50, making it practical for shop stock and service van inventory. It meets 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 products\u003c\/li\u003e\n\u003cli\u003e70 durometer hardness rating — firm, hard classification for reliable compression sealing\u003c\/li\u003e\n\u003cli\u003eOperating temperature range: -40 degrees F to 250 degrees F\u003c\/li\u003e\n\u003cli\u003eRound cross section per Dash 143 standard sizing\u003c\/li\u003e\n\u003cli\u003eMeets SAE and MIL-Spec standards\u003c\/li\u003e\n\u003cli\u003ePackage quantity of 50 for shop stock and high-volume service use\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard Dash 143 O-ring replacement compatible with petroleum-based fluid systems including hydraulic circuits, valve assemblies, and pump components where Buna-N elastomer is specified. Not recommended for applications involving ozone, direct sunlight exposure, or electrical equipment that generates ozone.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is typically performed by licensed plumbers, HVAC technicians, or hydraulic equipment technicians. De-pressurize and drain the system completely before removing the old O-ring. Inspect the gland seat for scoring or debris that could compromise the new seal. Lightly lubricate the O-ring with a compatible petroleum-based or system-fluid lubricant before seating to prevent twisting or rolling during assembly.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 2.438 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 2.625 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 0.094 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: 143\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 Durometer (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\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\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: ZMSCH70143\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51711046975794,"sku":"ZMSCH70143","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d07c30dd8efcd500b8bb1759bdfbae86_7e35cecf-6b46-4901-af19-2c8e2a64ac71.jpg?v=1788473898","url":"https:\/\/voomisupply.com\/products\/value-collection-zmsch70143-o-ring-dash-143-buna-n","provider":"Voomi Supply","version":"1.0","type":"link"}