National Oil Seal RVTRIM8B Trim Kit for RV-185B Microwave Oven

National Oil Seal

<h3>About National Oil Seal</h3><p>When it comes to wheel-end integrity and precision sealing, few names carry as much weight as <strong>National Oil Seal</strong>. With more than 75 years of engineering experience behind it, National has earned a reputation as one of the most respected brands in the automotive aftermarket — a legacy built on dependable performance across millions of passenger cars, trucks, and heavy-duty vehicles.</p><p>Originally developed under the Federal-Mogul umbrella, National Oil Seal is now distributed through <strong>DRiV Motorparts</strong>, giving it access to a world-class engineering network and distribution infrastructure. The brand&apos;s part numbering system has become so widely adopted that it is used as an industry-wide reference standard — a testament to just how influential National has been in shaping the sealing and bearing aftermarket.</p><h3>What National Oil Seal Makes</h3><p>At its core, National specializes in <strong>wheel-end solutions</strong> and <strong>sealing technology</strong>. The brand&apos;s product catalog spans a wide range of components designed to keep lubricants in and contaminants out, with coverage for thousands of domestic and import vehicle applications.</p><p>The brand&apos;s wheel bearing and hub assemblies are among its best-selling offerings, delivering pre-greased, pre-set, and pre-torqued units that simplify installation while meeting or exceeding original equipment specifications. Complementing these are National&apos;s wheel hubs, engineered to precise dimensional tolerances for accurate fitment and long-lasting performance.</p><p>Of course, <a href="/1335-national-oil-seal-oil-seals-21576">oil seals</a> remain the heart of the National product line. These seals — also known as shaft seals, grease seals, or dirt seals — close the gap between stationary and rotating components to retain lubricants and block out debris, moisture, and other contaminants. National&apos;s oil seals are available in a wide range of designs, including single and double lip, rubber and polymer compounds, and metal-cased varieties, making them suitable for an enormous breadth of applications.</p><p>National also offers a comprehensive lineup of wheel bearings — individual bearing components for applications where a full hub assembly isn&apos;t required. These bearings are manufactured to close tolerances and are designed to handle the radial and axial loads generated during everyday driving and heavy-duty use alike.</p><p>One of National&apos;s standout innovations is the proprietary <strong>RediCoat</strong> sealant technology, which fills minor bore imperfections to ensure a leak-free installation even when housing surfaces aren&apos;t perfect — a real-world advantage for technicians working on older or worn components.</p><h3>Why Technicians Trust National Oil Seal</h3><p>Professional mechanics and serious DIYers have relied on National for decades because the brand consistently delivers OE-quality fit and function at an aftermarket price point. With broad vehicle coverage, application-specific engineering, and a part number system that serves as an industry benchmark, National Oil Seal remains an essential name for any wheel-end or sealing repair job.</p>