{"product_id":"value-collection-zmsch90251-o-ring-dash-251-nitrile-90d","title":"Value Collection ZMSCH90251 O-ring Dash 251 Nitrile 90D","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION ZMSCH90251 is a Dash 251 O-ring made from Nitrile Butadiene Rubber (Buna-N), the most widely used elastomer in fluid sealing applications. It measures 5.125 inches inside diameter, 5.375 inches outside diameter, and 0.125 inches thick with a round cross section. Rated at 90 durometer (extra hard), it delivers excellent resistance to petroleum-based fluids along with strong compression set, tear resistance, and abrasion resistance. The operating temperature range runs from -40 degrees F to 250 degrees F. Licensed plumbers, pipefitters, hydraulic technicians, and maintenance mechanics install this type of seal across a broad range of industrial and mechanical assemblies.\u003c\/p\u003e\n\u003cp\u003eThis O-ring is suited for static and dynamic sealing applications where petroleum product exposure is a primary concern. Typical installation scenarios include hydraulic cylinders, pumps, valves, pipe flanges, and fluid fittings in residential, commercial, and industrial settings. The Buna-N compound resists oils, fuels, and many hydraulic fluids. It is not recommended for use with ozone-generating environments or in direct sunlight storage conditions. Meets SAE and MIL-Spec standards, making it appropriate for both commercial maintenance and specification-driven work.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eBuna-N (Nitrile Butadiene Rubber) material with excellent resistance to petroleum products and hydraulic fluids\u003c\/li\u003e\n  \u003cli\u003e90 durometer extra hard rating for high-compression sealing applications\u003c\/li\u003e\n  \u003cli\u003eOperating range from -40 degrees F to 250 degrees F\u003c\/li\u003e\n  \u003cli\u003eRound cross section, Dash 251 standard sizing\u003c\/li\u003e\n  \u003cli\u003eMeets SAE and MIL-Spec standards\u003c\/li\u003e\n  \u003cli\u003ePackage quantity of 25 units per order\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eCompatible with petroleum products, hydraulic oils, fuels, and similar fluid media. Designed as a standard Dash 251 replacement O-ring for hydraulic, pneumatic, and fluid system components requiring a 5.125 inch inside diameter Buna-N seal.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is typically performed by licensed plumbers, pipefitters, or hydraulic system technicians. Always depressurize and drain the system before removing or installing any O-ring seal. Lubricate the O-ring with a compatible fluid or assembly lubricant to prevent twisting or tearing during installation. Do not store Buna-N O-rings near motors, electrical equipment, or in direct sunlight, as ozone and UV exposure degrade the elastomer over time.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\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: 251\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 5.125 inches (129.77 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 5.375 inches (136.52 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\u003eCross Section Shape\u003c\/strong\u003e: Round\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHardness\u003c\/strong\u003e: 90 durometer (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\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\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: 25\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1.33 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: ZMSCH90251\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51690741793074,"sku":"ZMSCH90251","price":23.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e63e5be40384736fb1f090e4d0cdd585_7addf02a-b38c-4cf5-be9e-e279fef039b0.jpg?v=1788274757","url":"https:\/\/voomisupply.com\/products\/value-collection-zmsch90251-o-ring-dash-251-nitrile-90d","provider":"Voomi Supply","version":"1.0","type":"link"}