{"product_id":"value-collection-zmsch70252-o-ring-dash-252-buna-n-70a-10-pack","title":"Value Collection ZMSCH70252 O-ring Dash 252 Buna-n 70A 10-pack","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION ZMSCH70252 is a Dash 252 Buna-N (Nitrile Butadiene Rubber) O-ring with a round cross section, sold in a pack of 10. It measures 5.25 inches inside diameter, 5.5 inches outside diameter, and 0.125 inches thick. With a 70 Shore A hardness rating, this O-ring delivers firm compression set resistance and reliable sealing in static and dynamic applications. Buna-N is the most widely used O-ring elastomer in the trade, offering strong resistance to petroleum-based fluids, hydraulic oils, and fuels. Black in color, it is rated for temperatures from -40 degrees F to 250 degrees F, making it suitable for a broad range of operating conditions.\u003c\/p\u003e\u003cp\u003eThis O-ring is used across HVAC, plumbing, hydraulics, and general mechanical service wherever a Dash 252 O-ring is required to seal against petroleum products or lubricating oils. Common applications include pump housings, valve bodies, pipe fittings, compressor ports, and fluid connectors. The 10-piece pack suits both single-job repairs and stocking for ongoing maintenance. It meets SAE and MIL-Spec standards, supporting use in commercial and industrial environments.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eBuna-N (Nitrile Butadiene Rubber) material — excellent resistance to petroleum products and hydraulic fluids\u003c\/li\u003e\n\u003cli\u003eDash 252 designation: 5.25 inches ID, 5.5 inches OD, 0.125 inches thick\u003c\/li\u003e\n\u003cli\u003e70 Shore A hardness — hard rating for reliable compression set performance\u003c\/li\u003e\n\u003cli\u003eOperating temperature range: -40 degrees F to 250 degrees F\u003c\/li\u003e\n\u003cli\u003eRound cross section for consistent sealing under compression\u003c\/li\u003e\n\u003cli\u003eMeets SAE and MIL-Spec standards\u003c\/li\u003e\n\u003cli\u003ePack of 10 per order\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard Dash 252 O-ring replacement compatible with petroleum-based fluid systems. Not recommended for exposure to ozone sources, direct sunlight during storage, or applications requiring FDA-compliant materials.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eO-ring installation is performed by plumbers, HVAC technicians, and mechanical service professionals. Always depressurize and drain the system before replacing any O-ring. Lightly lubricate the O-ring with a compatible fluid prior to seating to prevent twisting or tearing during installation. Do not store Buna-N O-rings near motors, electrical equipment, or in direct sunlight, as ozone exposure degrades the elastomer.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\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: 252\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 5.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 5.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness\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\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\u003eColor\u003c\/strong\u003e: Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFDA Approved\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: SAE, MIL-Spec\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\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: ZMSCH70252\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51695563637042,"sku":"ZMSCH70252","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/20853112634ddcc9024a8b26de344533.jpg?v=1788336500","url":"https:\/\/voomisupply.com\/products\/value-collection-zmsch70252-o-ring-dash-252-buna-n-70a-10-pack","provider":"Voomi Supply","version":"1.0","type":"link"}