{"product_id":"value-collection-zmschb90233-o-ring-backup-ring-nbr","title":"Value Collection ZMSCHB90233 O-ring Backup Ring Nbr","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION ZMSCHB90233 is a rectangular-cross-section backup ring O-ring made from Nitrile Butadiene Rubber (NBR), designed to prevent extrusion in high-pressure sealing applications. It measures 2.881 inches inside diameter, 3.117 inches outside diameter, and 0.0468 inches thick, conforming to Dash Number 8-233. With a durometer hardness rating of 90 (Extra Hard), this backup ring provides firm resistance against pressure-induced deformation. It handles a temperature range of -40 to 250 degrees F, making it suitable for a wide range of hydraulic, pneumatic, and fluid-handling systems where NBR chemical compatibility is appropriate.\u003c\/p\u003e\n\u003cp\u003eThis backup ring is used in hydraulic cylinders, pneumatic fittings, plumbing assemblies, and industrial fluid-transfer systems where standard O-rings require extrusion protection. The Dash 8-233 designation makes it straightforward to cross-reference and source for maintenance and repair work. It is commonly installed by plumbers, pipefitters, hydraulic technicians, and industrial maintenance professionals. Each package contains 25 pieces, with a minimum order quantity of 1 package.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eRectangular cross section functions as a backup ring to prevent O-ring extrusion under pressure\u003c\/li\u003e\n  \u003cli\u003eNitrile Butadiene Rubber construction offers solid resistance to petroleum-based fluids and oils\u003c\/li\u003e\n  \u003cli\u003e90 durometer Extra Hard hardness rating provides firm support in high-pressure sealing grooves\u003c\/li\u003e\n  \u003cli\u003eDash Number 8-233 designation for easy cross-reference with standard O-ring sizing charts\u003c\/li\u003e\n  \u003cli\u003eOperating temperature range of -40 to 250 degrees F suits a broad range of service environments\u003c\/li\u003e\n  \u003cli\u003ePackage quantity of 25 pieces supports stocking for service fleets and repair benches\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement backup ring for hydraulic, pneumatic, and fluid-handling assemblies requiring a Dash 8-233 rectangular NBR sealing element.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eBackup rings are installed by plumbers, pipefitters, and hydraulic or pneumatic technicians. Depressurize and isolate the system completely before disassembling any fitting or cylinder that contains this ring. Inspect the sealing groove for burrs or damage before seating the backup ring, and ensure the NBR material is chemically compatible with the system fluid. Follow applicable IPC or system-manufacturer guidelines for groove dimensions and assembly torque.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Nitrile Butadiene Rubber (NBR)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 2.881 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 3.117 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 0.0468 inches (3\/64 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCross Section Shape\u003c\/strong\u003e: Rectangle\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDash Number\u003c\/strong\u003e: 8-233\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHardness\u003c\/strong\u003e: 90 Durometer\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHardness Rating\u003c\/strong\u003e: 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\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: 0.02 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: ZMSCHB90233\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51699992199474,"sku":"ZMSCHB90233","price":25.64,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/bbbcceebcc98f31c0d76bce29370f44a_24f834fd-7150-4125-831d-05757f7503cb.jpg?v=1788384657","url":"https:\/\/voomisupply.com\/products\/value-collection-zmschb90233-o-ring-backup-ring-nbr","provider":"Voomi Supply","version":"1.0","type":"link"}