{"product_id":"value-collection-zmsch90236-o-ring-dash-236-nbr-90a-50-pack","title":"Value Collection ZMSCH90236 O-ring Dash 236 Nbr 90A 50-pack","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION ZMSCH90236 is a Dash 236 Nitrile Butadiene Rubber (Buna-N) O-ring sized at 3.25 inches inside diameter, 3.5 inches outside diameter, and 0.125 inches thick with a round cross section. Rated at 90 durometer (extra hard), this O-ring is engineered for static and dynamic sealing applications involving petroleum-based fluids and gases. The Buna-N elastomer compound delivers excellent compression set resistance along with strong tear and abrasion resistance, making it the most commonly specified O-ring material across HVAC, plumbing, hydraulic, and pneumatic systems. The operating temperature range spans -40 degrees F to 250 degrees F. Licensed HVAC technicians, plumbers, and pipefitters regularly stock this size for routine maintenance and emergency repairs.\u003c\/p\u003e\n\u003cp\u003eThis O-ring is suited for residential and commercial applications where petroleum-product compatibility is required. Typical uses include pump shaft seals, valve stem packing, refrigerant service port seals, hydraulic cylinder end caps, and threaded pipe fitting face seals. The extra-hard 90 durometer rating makes it appropriate for higher-pressure dynamic applications where a softer compound would extrude or fail prematurely. Sold in a package quantity of 50, this SKU is well suited for service contractors and shop stockrooms maintaining inventory of common Dash 236 seals. Note: Buna-N should not be used with synthetic lubricants, ketones, esters, or strong acids.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eBuna-N (Nitrile) elastomer — the most widely used O-ring material for petroleum-product compatibility\u003c\/li\u003e\n  \u003cli\u003e90 durometer extra-hard rating for reduced extrusion risk in dynamic and high-pressure sealing environments\u003c\/li\u003e\n  \u003cli\u003eWide temperature range: -40 degrees F to 250 degrees F\u003c\/li\u003e\n  \u003cli\u003eRound cross section, 0.125 inches thick, conforming to Dash 236 standard sizing\u003c\/li\u003e\n  \u003cli\u003eMeets SAE and MIL-Spec standards\u003c\/li\u003e\n  \u003cli\u003ePackage of 50 units minimizes per-unit cost for high-volume service operations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with petroleum products including hydraulic oils, fuels, and mineral-based lubricants. Compatible material designation per supplier data is Petroleum Products. Conforms to SAE and MIL-Spec O-ring standards for Dash 236 sizing. Not compatible with synthetic esters, ketones, or strong oxidizing agents. FDA approval status: No.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eO-ring replacement is performed by licensed HVAC technicians, journeyman plumbers, or hydraulic system mechanics depending on the application. Before service, de-energize any electrical components, relieve system pressure, and isolate the fluid circuit at the appropriate shutoff valve. Inspect the seating groove for nicks, burrs, or corrosion before installing the new O-ring, and apply a thin film of compatible lubricant to the O-ring to reduce installation stress and prevent initial dry-run damage. Do not store Buna-N O-rings in direct sunlight or near motors, transformers, or other equipment that generates ozone, as ozone exposure degrades nitrile rubber.\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: 236\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 3.25 inches (82.14 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 3.5 inches (88.90 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: 50\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1.75 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: ZMSCH90236\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51720382841138,"sku":"ZMSCH90236","price":21.71,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e63e5be40384736fb1f090e4d0cdd585_10008599-bd01-4f37-938c-2d436519754d.jpg?v=1788563080","url":"https:\/\/voomisupply.com\/products\/value-collection-zmsch90236-o-ring-dash-236-nbr-90a-50-pack","provider":"Voomi Supply","version":"1.0","type":"link"}