{"product_id":"value-collection-zmsch70md239-o-ring-dash-239-buna-n-5-pack","title":"Value Collection ZMSCH70MD239 O-ring Dash 239 Buna-n 5-pack","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION ZMSCH70MD239 is a Dash 239 O-ring made from Nitrile Butadiene Rubber (Buna-N), the most widely used elastomer in sealing applications. It measures 3.609 inches inside diameter, 3.875 inches outside diameter, and 0.125 inches thick with a round cross section. Rated at 70 Shore A hardness, this O-ring delivers reliable sealing performance across a broad temperature range of -40 degrees F to 250 degrees F. It is sold in a pack of 5 and is installed by plumbers, pipefitters, HVAC technicians, and maintenance professionals working on fluid or pneumatic systems involving petroleum-based media.\u003c\/p\u003e\n\u003cp\u003eBuna-N O-rings in the Dash 239 size are commonly used in hydraulic fittings, fuel systems, compressor assemblies, pneumatic cylinders, and valve bodies where petroleum product exposure is expected. This size is a standard AN\/MS dash number used across industrial, commercial HVAC, and plumbing applications. The round cross section seats into standard O-ring grooves machined to Dash 239 tolerances.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eNitrile Butadiene Rubber (Buna-N) construction offers excellent resistance to petroleum products, oils, and fuels\u003c\/li\u003e\n  \u003cli\u003e70 Shore A hardness rating provides a firm, durable seal with strong compression set resistance\u003c\/li\u003e\n  \u003cli\u003eOperating temperature range of -40 degrees F to 250 degrees F suits a wide range of service environments\u003c\/li\u003e\n  \u003cli\u003eRound cross section conforms to standard Dash 239 groove dimensions\u003c\/li\u003e\n  \u003cli\u003eGood tear and abrasion resistance for long service life in dynamic and static applications\u003c\/li\u003e\n  \u003cli\u003ePack of 5 units per order; minimum order quantity of 1 pack\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in systems and assemblies that are compatible with petroleum products and other media suitable for Buna-N elastomers. Fits standard Dash 239 O-ring grooves. Not approved for FDA food-contact applications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified technician familiar with sealing system requirements. Before installing, de-energize the system and relieve all pressure from hydraulic or pneumatic lines per applicable safety procedures. Lightly lubricate the O-ring with a petroleum-compatible lubricant to ease installation and prevent rolling or twisting in the groove. Do not store O-rings in direct sunlight or near motors or other electrical equipment that may generate ozone, as this degrades Buna-N material over time.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 3.609 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 3.875 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\u003eDash Number\u003c\/strong\u003e: 239\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\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 Media\u003c\/strong\u003e: Petroleum Products\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: 5\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 3.37 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: ZMSCH70MD239\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51699552616754,"sku":"ZMSCH70MD239","price":24.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d07c30dd8efcd500b8bb1759bdfbae86_ddc3e194-eeab-4c67-867b-3eab52b5e4c7.jpg?v=1788377345","url":"https:\/\/voomisupply.com\/products\/value-collection-zmsch70md239-o-ring-dash-239-buna-n-5-pack","provider":"Voomi Supply","version":"1.0","type":"link"}