{"product_id":"value-collection-zmsch90252-o-ring-dash-252-nitrile-90a","title":"Value Collection ZMSCH90252 O-ring Dash 252 Nitrile 90A","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION ZMSCH90252 is a Dash 252 Nitrile Butadiene Rubber (Buna-N) O-ring used to create reliable seals in hydraulic, pneumatic, and fluid-handling assemblies. It measures 5.25 inches inside diameter, 5.5 inches outside diameter, and 0.125 inches thick with a round cross-section. The compound is rated at 90 durometer, placing it in the extra-hard hardness range, which suits high-pressure and high-wear applications. Rated for service from -40 to 250 degrees F, this O-ring handles both cold-start conditions and elevated operating temperatures commonly seen in industrial and mechanical systems. Installation is performed by maintenance technicians, millwrights, and plumbing or HVAC service professionals.\u003c\/p\u003e\n\u003cp\u003eThis O-ring is suited for use in static and dynamic sealing applications where petroleum-based fluids, oils, or fuels are present. Buna-N is the most widely used O-ring elastomer in trade applications and performs well in hydraulic systems, fuel lines, pumps, valves, and fittings. Its extra-hard 90 durometer rating makes it appropriate for assemblies that require resistance to extrusion under pressure. The part is sold in a package quantity of 25 units, making it practical for service fleets or shops that replace O-rings as part of routine maintenance.\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, oils, and fuels\u003c\/li\u003e\n  \u003cli\u003e90 durometer extra-hard rating resists extrusion and deformation under pressure\u003c\/li\u003e\n  \u003cli\u003eOperating temperature range of -40 to 250 degrees F covers cold-climate startup and elevated service conditions\u003c\/li\u003e\n  \u003cli\u003eRound cross-section, 0.125 inches thick, conforming to Dash 252 standard sizing\u003c\/li\u003e\n  \u003cli\u003eGood tear and abrasion resistance extends service life in dynamic sealing applications\u003c\/li\u003e\n  \u003cli\u003eMeets SAE and MIL-Spec standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with petroleum-based products and compatible fluids. Buna-N O-rings in Dash 252 sizing are a standard replacement in hydraulic systems, pumps, valves, and fluid fittings requiring a 5.25-inch inside diameter seal. Not FDA approved; not recommended for applications requiring food-grade or ozone-exposed environments. Avoid storage in direct sunlight or near motors or electrical equipment that may generate ozone.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eDepressurize and isolate the system before removing any seals or fittings. Clean the seal groove of debris, nicks, and old compound before installing the new O-ring. Lightly lubricate the O-ring with a compatible fluid during installation to prevent pinching or tearing. Inspect the mating surfaces for damage that could compromise the seal after installation.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 5.25 inches (132.94 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 5.5 inches (139.70 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 0.125 inches (3.53 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDash Number\u003c\/strong\u003e: 252\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: 90 Durometer (Extra 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 Material\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 pieces\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1.37 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31401503\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: ZMSCH90252\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51721402482994,"sku":"ZMSCH90252","price":24.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e63e5be40384736fb1f090e4d0cdd585_4c25dc36-cbeb-4bae-85e3-717a837f8ded.jpg?v=1788577072","url":"https:\/\/voomisupply.com\/products\/value-collection-zmsch90252-o-ring-dash-252-nitrile-90a","provider":"Voomi Supply","version":"1.0","type":"link"}