Oil Seal National 719316 Fluoroelastomer Multi‑Lip Spring Loaded Seal

Description

Product Overview

The National Oil Seal model 719316 is engineered for demanding automotive environments where reliability and durability are non‑negotiable. Constructed from premium fluoroelastomer, the seal offers exceptional resistance to heat, ozone, oil, fuel, and a wide range of chemicals. Its spring‑loaded, multi‑lip architecture provides a self‑adjusting sealing action that compensates for shaft wear and thermal expansion, ensuring a tight barrier throughout the service life. The seal measures 3.25 x 0.88 x 3.25 inches and weighs only 1.6 ounces, making it compact enough for tight engine bays while delivering robust performance. Designed to meet a temperature spectrum from –40°F to 400°F, it can handle extreme cold starts and high‑temperature operation without loss of elasticity. The product is packaged in a rubber mat for protection during shipping and handling, and it carries the National brand reputation for quality and consistency.

Usage

This oil seal is ideally suited for differential and gear assemblies in passenger cars, light trucks, and off‑road vehicles. It excels in applications such as rear‑axle differentials, transmission gear sets, and pump housings where fluid containment is critical. The seal’s multi‑lip design creates multiple sealing points, reducing the likelihood of leakage even under high pressure or pulsating loads. Its fluoroelastomer composition tolerates aggressive fluids, including synthetic oils, transmission fluids, and hydraulic liquids, making it a versatile choice for both OEM replacements and aftermarket upgrades. Installation is straightforward: the seal fits standard bore sizes and can be pressed into place with conventional tools. Once installed, the spring‑loaded lips maintain constant contact with the rotating shaft, delivering consistent performance from cold‑weather starts to hot‑run conditions. The seal’s high‑temperature capability also makes it suitable for performance‑tuned engines and heavy‑duty equipment that operate beyond typical temperature limits.

Why Choose Us

Choosing the National Oil Seal 719316 means selecting a product backed by decades of engineering expertise and rigorous quality control. Each seal undergoes a multi‑stage testing process that includes dimensional verification, material aging, and pressure endurance trials to guarantee that it meets or exceeds OEM specifications. National’s commitment to customer satisfaction is reflected in its responsive support network, which provides technical assistance, installation guidance, and warranty coverage. The fluoroelastomer material not only extends the seal’s service interval but also reduces the frequency of maintenance shutdowns, translating into lower total ownership costs. Moreover, the spring‑loaded multi‑lip configuration offers a self‑sealing capability that adapts to shaft wear, eliminating the need for frequent reseating. When you purchase this seal, you receive a product that combines high‑performance materials, precision engineering, and a proven track record of reliability in the toughest automotive environments.

Key Features

• Fluoroelastomer construction provides superior chemical and heat resistance for long‑lasting performance.
• Spring‑loaded multi‑lip design ensures continuous sealing pressure and adapts to shaft wear.
• Wide operating temperature range from –40°F to 400°F covers extreme cold starts and high‑heat operation.
• Compatible with a broad spectrum of automotive fluids, including synthetic oils and hydraulic liquids.
• National’s dedicated customer support offers technical assistance and warranty protection for peace of mind.

FAQ

What makes fluoroelastomer better than standard rubber for oil seals?

Fluoroelastomer offers higher resistance to heat, ozone, and aggressive chemicals compared to conventional nitrile or EPDM rubbers. This results in a longer service life, especially in high‑temperature or chemically harsh environments.

Can this seal be used in high‑performance or racing applications?

Yes. The seal’s temperature rating up to 400°F and its robust multi‑lip design make it suitable for performance‑tuned engines and racing differentials where elevated temperatures and pressures are common.

How do I install the National Oil Seal 719316 correctly?

First, clean the housing and shaft to remove any debris. Align the seal with the bore and press it in using a seal installer or a suitable tool, ensuring even pressure. Verify that the seal sits flush with the housing surface before re‑assembling the component.

Is the seal compatible with both synthetic and mineral oils?

Absolutely. The fluoroelastomer material is formulated to resist both synthetic and mineral oil formulations, providing reliable sealing regardless of the fluid type used in the system.

What warranty does National provide for this oil seal?

National offers a limited warranty that covers material defects and premature failure under normal operating conditions. For detailed warranty terms, contact National’s customer service or refer to the product documentation.