{"product_id":"value-collection-zmschb90027-nbr-backup-o-ring-dash-8-027-50pk","title":"Value Collection ZMSCHB90027 Nbr Backup O-ring Dash 8-027 50pk","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION ZMSCHB90027 is a rectangular cross-section backup O-ring made from Nitrile Butadiene Rubber (NBR), designed to prevent O-ring extrusion in high-pressure sealing applications. It carries a Dash 8-027 designation and measures 1.33 inches inside diameter by 1.436 inches outside diameter with a thickness of 0.0468 inches. The 90 durometer hardness rating places this ring in the extra-hard category, making it suitable for dynamic and static sealing scenarios where softer rings would deform or migrate under pressure. Operating temperature range spans -40 to 250 degrees F. Each package contains 50 rings. Installation is typically performed by plumbers, fluid power technicians, and maintenance mechanics working on hydraulic, pneumatic, or fluid handling assemblies.\u003c\/p\u003e\u003cp\u003eThis backup ring is used in residential and commercial applications wherever NBR-compatible sealing is required at moderate to elevated temperatures. It is well suited for hydraulic cylinders, pneumatic fittings, pump housings, and valve assemblies that see pressure cycling. The rectangular cross section seats cleanly in standard O-ring grooves and acts as a support ring to reduce extrusion gap blowout. The Dash 8-027 designation aligns with standard O-ring sizing charts used across the fluid sealing industry.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eNitrile Butadiene Rubber construction with broad chemical resistance to oils, fuels, and hydraulic fluids\u003c\/li\u003e\n\u003cli\u003e90 durometer extra-hard rating resists extrusion under high-pressure conditions\u003c\/li\u003e\n\u003cli\u003eRectangular cross-section profile provides positive backup support in standard O-ring grooves\u003c\/li\u003e\n\u003cli\u003eTemperature range of -40 to 250 degrees F suits a wide range of fluid system environments\u003c\/li\u003e\n\u003cli\u003eDash 8-027 sizing aligns with industry-standard O-ring groove dimensions\u003c\/li\u003e\n\u003cli\u003ePackaged in a quantity of 50 for shop or service truck stocking\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard Dash 8-027 backup ring for use with NBR-compatible O-ring groove assemblies in hydraulic, pneumatic, and general fluid sealing applications. Verify groove dimensions against inside diameter, outside diameter, and thickness specifications before installation.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003ePower down or depressurize the system fully before removing any seals or fittings. Clean the groove thoroughly and inspect for burrs or damage that could compromise the new ring. Lubricate the ring lightly with a compatible fluid before seating to avoid pinching or rolling during assembly. This work is typically performed by licensed plumbers, hydraulic technicians, or qualified maintenance personnel following applicable equipment service procedures.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Nitrile Butadiene Rubber (NBR)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDash Number\u003c\/strong\u003e: 8-027\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 1.33 inches (33.78 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 1.436 inches (36.48 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 0.0468 inches (1.15 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCross Section Shape\u003c\/strong\u003e: Rectangle\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: 50\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.05 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31401503\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: ZMSCHB90027\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51699798278450,"sku":"ZMSCHB90027","price":18.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/bbbcceebcc98f31c0d76bce29370f44a_98fe7977-cb80-48f7-95bb-b40512c3e462.jpg?v=1788381140","url":"https:\/\/voomisupply.com\/products\/value-collection-zmschb90027-nbr-backup-o-ring-dash-8-027-50pk","provider":"Voomi Supply","version":"1.0","type":"link"}