{"product_id":"national-multi-purpose-spring-loaded-seal-2-250-x-3-371-x-0-375-multi-lip-hydrocarbon-resistant","title":"National Multi-Purpose Spring-Loaded Seal 2.250 x 3.371 x 0.375 — multi-lip, hydrocarbon-resistant","description":"\u003cstrong\u003eNational 412920 is a spring-loaded, multi-lip industrial seal sized 2.250 x 3.371 x 0.375 designed to provide reliable sealing across a broad temperature range and resist hydrocarbon swelling.\u003c\/strong\u003e\n\n\u003cp\u003eEngineered by National, a brand with over 75 years of experience in sealing solutions, the 412920 Multi-Purpose Seal is built for heavy-duty repair and maintenance tasks where consistent performance matters. Its spring-loaded, multi-lip configuration and material choices focus on durability, low-temperature flexibility, and reduced swelling in hydrocarbon environments. Before installing, confirm fitment with your equipment specifications to ensure compatibility.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the seal handle extreme temperatures and cold starts?\u003c\/h3\u003e\n\u003cp\u003eThe National 412920 is rated from -40°F to 225°F (-40°C to 107°C), so it stays flexible in cold conditions while maintaining integrity at elevated temperatures common in industrial equipment. The materials deliver good low-temperature capability, reducing the risk of hardening or cracking during cold startups.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOperating range: -40°F to 225°F (-40°C to 107°C)\u003c\/li\u003e\n  \u003cli\u003eMaterial formulation retains flexibility at low temperatures\u003c\/li\u003e\n  \u003cli\u003eDesigned to resist thermal degradation during normal industrial use\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat features ensure a reliable seal in hydrocarbon environments?\u003c\/h3\u003e\n\u003cp\u003eThis seal is formulated for low swell when exposed to hydrocarbon fluids, which helps preserve the sealing lips and maintain contact against shafts and bores. The multi-lip geometry plus a spring-loaded energizer keeps consistent radial pressure, reducing leakage risk in oil- and fuel-exposed systems.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLow swell in hydrocarbon fluids minimizes dimensional change\u003c\/li\u003e\n  \u003cli\u003eMulti-lip profile provides multiple sealing barriers\u003c\/li\u003e\n  \u003cli\u003eSpring-loaded design maintains consistent sealing force\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I verify this is the right part for my equipment?\u003c\/h3\u003e\n\u003cp\u003eConfirm fitment by comparing the seal's dimensions (2.250 x 3.371 x 0.375 inches) and design to your equipment's service manual or parts diagram. Use the vendor compatibility tool where available and enter full vehicle or machine details—year, make, model, engine, and trim—before ordering. Pay attention to any fitment notes or qualifiers listed with the part.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eExact dimensions: 2.250\" ID x 3.371\" OD x 0.375\" cross-section\u003c\/li\u003e\n  \u003cli\u003eCheck equipment parts diagram for spring-loaded, multi-lip seals\u003c\/li\u003e\n  \u003cli\u003eUse compatibility\/fitment tools and read any additional notes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat installation and maintenance tips improve seal longevity?\u003c\/h3\u003e\n\u003cp\u003eInstall the seal with clean mating surfaces and proper lubrication to prevent lip damage during assembly. Ensure correct shaft finish and concentricity to avoid premature wear, and inspect periodically for hardening, tearing, or extrusion, replacing at the first sign of damage.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eClean housing and shaft before installation\u003c\/li\u003e\n  \u003cli\u003eUse compatible lubricant on sealing lips during assembly\u003c\/li\u003e\n  \u003cli\u003eMonitor shaft finish and alignment to prevent uneven wear\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: technicians, maintenance crews, and aftermarket parts buyers who require a dependable industrial seal for oil- or hydrocarbon-exposed equipment. The National 412920 suits repair shops and facilities needing a resilient, spring-energized multi-lip seal with wide temperature tolerance and reduced fluid swelling. If you manage heavy machinery, pumps, or drivetrain components and need a direct replacement or upgrade with proven brand pedigree, this part is designed for that purpose.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What are the exact dimensions of the National 412920 seal?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The seal measures 2.250\" ID × 3.371\" OD × 0.375\" cross-section.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is this seal suitable for oil and hydrocarbon exposure?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes—it's formulated for low swell in hydrocarbon fluids and designed for oil-exposed equipment.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"National","offers":[{"title":"Default Title","offer_id":48084756234398,"sku":"B001ODB0S8","price":34.94,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/national-front-packaging.jpg?v=1785861875","url":"https:\/\/northtrailauto.ca\/products\/national-multi-purpose-spring-loaded-seal-2-250-x-3-371-x-0-375-multi-lip-hydrocarbon-resistant","provider":"North Trail Auto","version":"1.0","type":"link"}