{"product_id":"value-collection-zmsch70253-o-ring-dash-253-nbr-70-duro","title":"Value Collection ZMSCH70253 O-ring Dash 253 Nbr 70 Duro","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION ZMSCH70253 is a Dash 253 O-ring made from Nitrile Butadiene Rubber (NBR, also known as Buna-N), designed for static and dynamic sealing applications in fluid and pneumatic systems. It measures 5.375 inches inside diameter by 5.625 inches outside diameter with a 0.125-inch cross-section thickness. The round cross-section profile seats reliably in standard AN\/MS grooves sized for a Dash 253 ring. At 70 Shore A hardness, it provides a firm, reliable seal with good compression set resistance, tear strength, and abrasion resistance. Plumbers, pipefitters, HVAC technicians, and fluid-power mechanics install this type of ring across a wide range of petroleum-based fluid and air service applications.\u003c\/p\u003e\n\u003cp\u003eThis O-ring is suited for use in hydraulic systems, pneumatic assemblies, pumps, valves, cylinders, and pipe fittings where compatibility with petroleum-based fluids and oils is required. The NBR compound offers reliable sealing across a service temperature range of -40 degrees F to 250 degrees F, making it appropriate for both refrigerated and moderate high-temperature process lines. Sold in a package quantity of 10 rings, it is a practical stock item for shops and field service kits where the Dash 253 size is a common fitment.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eBuna-N (NBR) elastomer — excellent resistance to petroleum products, oils, and fuels\u003c\/li\u003e\n  \u003cli\u003e70 Shore A hardness rating provides firm sealing with good compression set performance\u003c\/li\u003e\n  \u003cli\u003eRound cross-section profile fits standard Dash 253 AN\/MS O-ring grooves\u003c\/li\u003e\n  \u003cli\u003eOperating temperature range: -40 degrees F to 250 degrees F\u003c\/li\u003e\n  \u003cli\u003eTear and abrasion resistance extends service life in dynamic sealing applications\u003c\/li\u003e\n  \u003cli\u003eMeets SAE and MIL-Spec standards for dimensional and material compliance\u003c\/li\u003e\n  \u003cli\u003ePackage quantity of 10 rings per order\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard Dash 253 replacement O-ring compatible with petroleum products and suitable for use in hydraulic, pneumatic, and fluid-transfer assemblies requiring a 5.375-inch ID NBR seal. Not recommended for use with ozone-generating equipment, in direct sunlight storage, or in applications requiring FDA-approved materials.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eDepressurize and isolate the system completely before removing the old O-ring or installing a replacement. Lightly lubricate the ring with a compatible fluid or O-ring lubricant before seating it to prevent tearing during assembly. Avoid twisting or rolling the ring into the groove — seat it evenly around the full circumference. Inspect the groove for nicks or corrosion that could compromise the seal before installation.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 5.375 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 5.625 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCross-Section Thickness\u003c\/strong\u003e: 0.125 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: 253\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Nitrile Butadiene Rubber (Buna-N)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHardness\u003c\/strong\u003e: 70 Shore A (Hard)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColor\u003c\/strong\u003e: Black\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\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\u003eUNSPSC Code\u003c\/strong\u003e: 31401503\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 10\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: ZMSCH70253\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51722723295538,"sku":"ZMSCH70253","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f5ec609891701a0409ed49cb46f0c5dd.jpg?v=1788594994","url":"https:\/\/voomisupply.com\/products\/value-collection-zmsch70253-o-ring-dash-253-nbr-70-duro","provider":"Voomi Supply","version":"1.0","type":"link"}