{"product_id":"value-collection-zmsch90248-o-ring-dash-248-nbr-90d","title":"Value Collection ZMSCH90248 O-ring Dash 248 Nbr 90D","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION ZMSCH90248 is a Dash 248 Buna-N (Nitrile Butadiene Rubber) O-ring engineered for reliable sealing in demanding fluid-handling applications. It measures 4.75 inches inside diameter, 5 inches outside diameter, and 0.125 inches thick, with a round cross-section profile. Rated at 90 durometer (extra hard), this O-ring delivers excellent compression set resistance along with strong tear and abrasion resistance. The operating temperature range runs from -40 degrees F to 250 degrees F, making it suitable for a broad range of service conditions. Licensed plumbers, HVAC technicians, and mechanical contractors routinely specify Buna-N O-rings for petroleum and hydraulic fluid sealing.\u003c\/p\u003e\n\u003cp\u003eThis O-ring is well suited for residential and commercial plumbing, HVAC refrigerant-adjacent assemblies, hydraulic systems, and general industrial fluid sealing where petroleum-based media are present. Buna-N is the most widely used O-ring elastomer in the trade and is the standard choice when a system handles petroleum products, oils, fuels, or hydraulic fluids. It is not recommended for exposure to ozone-generating equipment or prolonged direct sunlight. The Dash 248 designation follows standard O-ring sizing per SAE and MIL-Spec references, allowing straightforward cross-referencing during field repair or scheduled maintenance.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eBuna-N (Nitrile Butadiene Rubber) construction — excellent resistance to petroleum products and hydraulic fluids\u003c\/li\u003e\n  \u003cli\u003e90 durometer extra-hard rating for strong compression set and extrusion resistance under pressure\u003c\/li\u003e\n  \u003cli\u003eOperating range of -40 degrees F to 250 degrees F covers most HVAC, plumbing, and industrial service environments\u003c\/li\u003e\n  \u003cli\u003eStandard Dash 248 designation per SAE and MIL-Spec for easy cross-referencing\u003c\/li\u003e\n  \u003cli\u003eRound cross-section profile seats cleanly in standard O-ring grooves without rotation issues\u003c\/li\u003e\n  \u003cli\u003eSold in a package quantity of 25, suitable for stocking service vans or shop inventory\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard Dash 248 O-ring replacement compatible with petroleum-based fluid systems, hydraulic assemblies, and mechanical sealing applications where Buna-N elastomer is specified. Compatible materials include petroleum products as noted in manufacturer specifications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a licensed plumber, HVAC technician, or qualified mechanic. Always de-pressurize and isolate the system before removing any sealing components. Lightly lubricate the O-ring with a compatible petroleum-based or system-appropriate fluid before seating to prevent tearing during assembly. Do not store unused O-rings near motors, ozone-generating equipment, or in direct sunlight, as ozone and UV exposure degrade Buna-N material 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: 248\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 4.75 inches (120.24 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 5 inches (127.00 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\u003eCross Section Shape\u003c\/strong\u003e: Round\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 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\u003eFDA Approved\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: SAE, MIL-Spec\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 25\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1.3 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: ZMSCH90248\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51720312979762,"sku":"ZMSCH90248","price":21.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e63e5be40384736fb1f090e4d0cdd585_a4c1454a-e473-464f-ac82-55de9d013344.jpg?v=1788562395","url":"https:\/\/voomisupply.com\/products\/value-collection-zmsch90248-o-ring-dash-248-nbr-90d","provider":"Voomi Supply","version":"1.0","type":"link"}