{"product_id":"value-collection-zmsch70155-o-ring-4-in-id-nbr-dash-155-50-pack","title":"Value Collection ZMSCH70155 O-ring 4 in Id Nbr Dash 155 50-pack","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION ZMSCH70155 is a Dash 155 O-ring manufactured from Nitrile Butadiene Rubber (Buna-N), the most widely used elastomer in fluid sealing applications. This O-ring measures 4.0000 inches inside diameter, 4.1880 inches outside diameter, and 0.0937 inches (3\/32 inches) thick with a round cross section. It carries a Shore A hardness rating of 70, placing it in the hard range for reliable compression set resistance. Licensed HVAC technicians, plumbers, and industrial mechanics use this seal in systems where petroleum-based fluids or lubricants are present. Each order ships in a package quantity of 50 units.\u003c\/p\u003e\n\u003cp\u003eThis O-ring is suited for residential and commercial HVAC, plumbing, and hydraulic applications where Buna-N compatibility is required. Its petroleum product resistance makes it a common choice for refrigeration oil circuits, fuel handling assemblies, pneumatic fittings, and hydraulic valve bodies. The Dash 155 designation follows the standard AS568 sizing series, allowing direct cross-reference to OEM seal specifications across a wide range of equipment. It is not recommended for use in systems involving ozone exposure, direct sunlight storage, or near motors and electrical equipment that generate ozone.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eBuna-N (Nitrile Butadiene Rubber) construction with excellent resistance to petroleum products\u003c\/li\u003e\n  \u003cli\u003eDash 155 designation per AS568 standard sizing for broad cross-reference compatibility\u003c\/li\u003e\n  \u003cli\u003eShore A hardness of 70 for reliable compression set and seal retention\u003c\/li\u003e\n  \u003cli\u003eOperating temperature range of -40 degrees F to 250 degrees F\u003c\/li\u003e\n  \u003cli\u003eRound cross-section profile for standard groove seating\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\u003eCompatible with petroleum-based products and fluids. Designed as a standard Dash 155 replacement O-ring for use in applications where Buna-N elastomer is specified. Not FDA approved; not suitable for food-contact or potable-water applications where NSF or FDA-grade material is required.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by licensed HVAC technicians, plumbers, or qualified mechanics depending on the application. Always depressurize and de-energize the system before removing the old seal. Lightly lubricate the O-ring with a compatible fluid or assembly lubricant before seating it in the groove to prevent tearing during installation. Avoid over-stretching the ring; do not store unused O-rings near motors, ozone-generating equipment, or in direct sunlight.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 4.0000 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 4.1880 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 0.0937 inches (3\/32 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCross Section Shape\u003c\/strong\u003e: Round\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDash Number\u003c\/strong\u003e: 155\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: 70 Shore A (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 Fluids\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: 50\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.02 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: ZMSCH70155\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51698108662066,"sku":"ZMSCH70155","price":16.68,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d6ff282f582091f7929cb2b0897e3bda.jpg?v=1788357817","url":"https:\/\/voomisupply.com\/products\/value-collection-zmsch70155-o-ring-4-in-id-nbr-dash-155-50-pack","provider":"Voomi Supply","version":"1.0","type":"link"}