{"product_id":"value-collection-zmsch70157-o-ring-dash-157-nbr-4-5-in-id","title":"Value Collection ZMSCH70157 O-ring Dash 157 Nbr 4.5 in Id","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION ZMSCH70157 is a Dash 157 Nitrile Butadiene Rubber (NBR) o-ring used to create leak-free seals in hydraulic, pneumatic, and fluid system connections. It measures 4.5 inches inside diameter (ID), 4.688 inches outside diameter (OD), and 0.0937 inches thick, with a round cross section. Rated at 70 Shore A hardness, it performs reliably across a working temperature range of -40 degrees F to 250 degrees F. This is one of the most widely used o-ring elastomers in trade applications, offering strong resistance to petroleum products, solid compression set retention, and good tear and abrasion resistance. Each package contains 25 o-rings.\u003c\/p\u003e\u003cp\u003eThis o-ring is suited for use in HVAC, plumbing, hydraulic, and fluid power applications where petroleum-based media is present. The NBR compound is compatible with petroleum products including oils, fuels, and hydraulic fluids, making it a standard choice for residential and commercial service work. HVAC technicians, plumbers, and fluid system mechanics commonly install this o-ring when servicing valve bodies, manifolds, pump housings, and fittings that require a reliable static or dynamic face seal. It conforms to SAE and MIL-Spec standards.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e4.5 inches ID x 4.688 inches OD with 0.0937 inches (3\/32 inches) cross section thickness\u003c\/li\u003e\n\u003cli\u003eNitrile Butadiene Rubber (Buna-N) construction with 70 Shore A hardness rating\u003c\/li\u003e\n\u003cli\u003eWorking temperature range: -40 degrees F to 250 degrees F\u003c\/li\u003e\n\u003cli\u003eExcellent resistance to petroleum products, oils, and hydraulic fluids\u003c\/li\u003e\n\u003cli\u003eRound cross section for consistent compression and seal integrity\u003c\/li\u003e\n\u003cli\u003eMeets SAE and MIL-Spec standards; sold in a pack of 25\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eCompatible with petroleum products and petroleum-based fluids. Designed for use in systems where Buna-N elastomers are the specified sealing material. Not recommended for exposure to ozone, direct sunlight during storage, or ozone-generating electrical equipment.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInspect the sealing groove and mating surfaces for burrs or contamination before installation. Lubricate the o-ring with a compatible fluid or petroleum-based lubricant to ease installation and prevent twisting. Power down or depressurize the system fully before removing or replacing seals. Do not store unused o-rings in direct sunlight or near motors and other equipment that may generate ozone, as this degrades NBR compound over time.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 4.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 4.688 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 0.0937 inches (3\/32 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: 157\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\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: 25\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.02 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31401503\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: ZMSCH70157\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51714574549298,"sku":"ZMSCH70157","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ee2564927ef891470b095fc0b9a1d6d3.jpg?v=1788503338","url":"https:\/\/voomisupply.com\/products\/value-collection-zmsch70157-o-ring-dash-157-nbr-4-5-in-id","provider":"Voomi Supply","version":"1.0","type":"link"}