{"product_id":"value-collection-zmsch90121-buna-n-o-ring-dash-121-50-pack","title":"Value Collection ZMSCH90121 Buna-n O-ring Dash 121 50-pack","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION ZMSCH90121 is a Dash 121 O-ring made from Nitrile Butadiene Rubber, also known as Buna-N, the most widely used elastomer in sealing applications. It measures 1.63 inches inside diameter with a 0.094-inch cross-section thickness and carries a 90 durometer hardness rating, placing it in the extra-hard category. This O-ring is designed for static and dynamic sealing in hydraulic, pneumatic, and fluid-handling systems. It is sold in a pack of 50. Licensed technicians, machinists, and maintenance professionals working on petroleum-based fluid systems reach for Buna-N rings like this one as a reliable, cost-effective sealing solution.\u003c\/p\u003e\n\u003cp\u003eThis O-ring is suited for use in residential and commercial HVAC systems, hydraulic cylinders, pumps, valves, plumbing fittings, and general industrial fluid-handling equipment where exposure to petroleum-based oils and fuels is expected. The operating temperature range of -40 degrees F to 250 degrees F makes it appropriate for a wide range of indoor and outdoor service conditions. The round cross-section profile fits standard Dash 121 O-ring grooves per SAE and MIL-Spec dimensional standards.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eBuna-N (NBR) material provides excellent resistance to petroleum products, oils, and fuels\u003c\/li\u003e\n  \u003cli\u003e90 durometer extra-hard rating resists extrusion under pressure in tight-clearance grooves\u003c\/li\u003e\n  \u003cli\u003eTemperature rated from -40 degrees F to 250 degrees F for broad service range\u003c\/li\u003e\n  \u003cli\u003eMeets SAE and MIL-Spec dimensional standards for Dash 121 cross-section\u003c\/li\u003e\n  \u003cli\u003eGood compression set, tear resistance, and abrasion resistance for dynamic sealing\u003c\/li\u003e\n  \u003cli\u003ePack of 50 units supports service fleets, shop stock, and bulk repair work\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or service-stock O-ring for any application requiring a Dash 121 round cross-section ring in Buna-N material. Compatible with petroleum-based fluid media. Note: Buna-N should not be stored in direct sunlight or near motors and electrical equipment that may generate ozone, as ozone exposure degrades NBR elastomers.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eO-ring installation is typically performed by HVAC technicians, plumbers, hydraulic system mechanics, or industrial maintenance personnel. Before replacing an O-ring, de-energize the system, relieve all fluid pressure, and drain or isolate the relevant fluid circuit. Lubricate the O-ring with a compatible grease or fluid before seating it to prevent twisting or tearing during assembly. Do not over-stretch the ring during installation, and confirm the groove dimensions match the Dash 121 specification before use.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Nitrile Butadiene Rubber (Buna-N)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDash Number\u003c\/strong\u003e: 121\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 1.63 inches (26.64 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 1.25 inches (31.75 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 0.094 inches (2.62 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: 0.64 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: ZMSCH90121\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51701643837746,"sku":"ZMSCH90121","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e63e5be40384736fb1f090e4d0cdd585_c063ce31-4ab0-469d-b708-3469c12c46c0.jpg?v=1788403047","url":"https:\/\/voomisupply.com\/products\/value-collection-zmsch90121-buna-n-o-ring-dash-121-50-pack","provider":"Voomi Supply","version":"1.0","type":"link"}