{"product_id":"value-collection-zmsch90321-o-ring-dash-321-nbr","title":"Value Collection ZMSCH90321 O-ring Dash 321 Nbr","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION ZMSCH90321 is a Dash 321 nitrile butadiene rubber (Buna-N) O-ring used to create reliable fluid and pressure seals in a wide range of mechanical assemblies. It measures 1.188 inches inside diameter, 1.563 inches outside diameter, and 0.1875 inches thick with a round cross section. Rated at 90 durometer (extra hard), this O-ring handles operating temperatures from -40 degrees F to 250 degrees F and is compatible with petroleum-based fluids. Buna-N is the most widely used O-ring elastomer and offers excellent compression set resistance along with strong tear and abrasion resistance. Plumbers, HVAC technicians, and mechanical maintenance professionals install this part in hydraulic, pneumatic, and fluid-handling systems.\u003c\/p\u003e\n\u003cp\u003eThis O-ring is suited for residential and commercial applications involving petroleum-based media, including hydraulic cylinders, pump housings, valve stems, and fluid fittings. The extra-hard 90 durometer rating makes it appropriate for higher-pressure sealing applications where softer compounds may extrude. It is not FDA approved and should not be exposed to ozone-generating sources such as electric motors or direct sunlight during storage, as ozone degrades nitrile rubber over time. It meets SAE and MIL-Spec standards, making it a recognized choice for both commercial maintenance and OEM replacement use.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eBuna-N (nitrile butadiene rubber) construction with excellent resistance to petroleum products\u003c\/li\u003e\n  \u003cli\u003e90 durometer extra-hard rating for high-pressure sealing applications\u003c\/li\u003e\n  \u003cli\u003eOperating temperature range of -40 degrees F to 250 degrees F\u003c\/li\u003e\n  \u003cli\u003eRound cross section, Dash 321 standard sizing\u003c\/li\u003e\n  \u003cli\u003eMeets SAE and MIL-Spec standards\u003c\/li\u003e\n  \u003cli\u003eStrong tear and abrasion resistance with excellent compression set performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eCompatible with petroleum-based products and fluids. Designed as a standard Dash 321 O-ring replacement for hydraulic, pneumatic, and fluid-handling assemblies that require a 1.188 inch ID nitrile seal rated to SAE and MIL-Spec standards.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is typically performed by licensed plumbers, HVAC technicians, or mechanical maintenance professionals. Always depressurize and drain the system before removing or replacing O-rings to prevent fluid release or injury. Lightly lubricate the O-ring with a compatible petroleum-based lubricant before seating to prevent tearing during assembly. Do not store unused O-rings near electric motors, ozone-generating equipment, or in direct sunlight, 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\u003eInside Diameter\u003c\/strong\u003e: 1.188 inches (29.51 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 1.563 inches (39.70 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 0.1875 inches (5.33 mm)\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: 321\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\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: 50\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1.56 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: ZMSCH90321\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51717092409650,"sku":"ZMSCH90321","price":17.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e63e5be40384736fb1f090e4d0cdd585_8cd5a599-e619-4aa0-8398-0c7a61cd03a5.jpg?v=1788535589","url":"https:\/\/voomisupply.com\/products\/value-collection-zmsch90321-o-ring-dash-321-nbr","provider":"Voomi Supply","version":"1.0","type":"link"}