{"product_id":"value-collection-zmsch90249-o-ring-dash-249-nbr-90-duro","title":"Value Collection ZMSCH90249 O-ring Dash 249 Nbr 90 Duro","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION ZMSCH90249 is a Dash 249 Buna-N (Nitrile Butadiene Rubber) O-ring engineered for sealing applications in systems that handle petroleum-based fluids and hydraulic media. It measures 4.875 inches inside diameter and 5.125 inches outside diameter with a 0.125-inch cross-section thickness. The compound is rated at 90 durometer, placing it in the extra-hard hardness range for applications requiring high compression resistance and dimensional stability under load. Licensed plumbers, hydraulic technicians, and HVAC service pros install this ring wherever a robust, petroleum-resistant static or dynamic seal is needed.\u003c\/p\u003e\u003cp\u003eThis O-ring suits residential and commercial plumbing, hydraulic systems, pneumatic assemblies, and industrial fluid-handling equipment where petroleum product compatibility is required. The Buna-N compound provides excellent resistance to oils, fuels, and petroleum-based lubricants. It is not recommended for applications involving ozone exposure or direct UV storage, so installation in enclosed housings is preferred. The Dash 249 sizing is a standard AS568 dimension used across a wide range of OEM and aftermarket equipment.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eBuna-N (Nitrile Butadiene Rubber) compound — the most widely used O-ring elastomer for petroleum-fluid environments\u003c\/li\u003e\n\u003cli\u003e90 durometer extra-hard rating for high compression resistance and reduced extrusion under pressure\u003c\/li\u003e\n\u003cli\u003eOperating temperature range of -40 to 250 degrees F for broad service applicability\u003c\/li\u003e\n\u003cli\u003eExcellent compression set, tear resistance, and abrasion resistance for long service life\u003c\/li\u003e\n\u003cli\u003eMeets SAE and MIL-Spec standards\u003c\/li\u003e\n\u003cli\u003eRound cross-section profile; black color\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eCompatible with petroleum products including oils, fuels, and petroleum-based lubricants. Not suitable for use with ozone-generating environments or direct sunlight exposure. Conforms to SAE and MIL-Spec standards for Dash 249 O-ring dimensions.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified plumber, hydraulic technician, or mechanical service professional. Shut off and depressurize the system fully before removing the old seal and installing the replacement ring. Lubricate the O-ring with a compatible petroleum-based or system-appropriate lubricant prior to seating to prevent tearing during installation. Do not store or install near motors, electrical equipment, or other ozone-generating sources, as ozone degrades Buna-N compound.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\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: 249\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 4.875 inches (123.42 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 5.125 inches (130.17 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\u003eHardness\u003c\/strong\u003e: 90 Durometer (Extra Hard)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCross Section Shape\u003c\/strong\u003e: Round\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: 1.32 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: ZMSCH90249\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51696851878194,"sku":"ZMSCH90249","price":22.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e63e5be40384736fb1f090e4d0cdd585_a189b0ac-e520-43a1-ba5b-f24f23e7e0cd.jpg?v=1788347031","url":"https:\/\/voomisupply.com\/products\/value-collection-zmsch90249-o-ring-dash-249-nbr-90-duro","provider":"Voomi Supply","version":"1.0","type":"link"}