Description
Product Overview
The JAZ 12‑Hole Flange Gasket is a precision‑engineered sealing component crafted from high‑grade engineering plastic, a material chosen for its balance of flexibility, chemical resistance, and dimensional stability. Measuring 4.9 × 5.1 × 0.6 inches and weighing only 0.32 ounces, the gasket provides a lightweight yet robust barrier that fits the twelve‑hole flange pattern commonly found in both front‑axle and rear‑axle assemblies. Its 0.25‑inch thickness has been optimized through extensive testing to deliver the ideal compression rate, ensuring that the seal remains tight under a wide range of pressures while avoiding over‑compression that could lead to premature wear. The round shape of the gasket distributes load evenly across the mating surfaces, reducing the likelihood of localized stress concentrations that can cause leaks in high‑vibration environments such as racing or off‑road applications.
Manufactured by JAZ, a brand with a long history of supplying reliable automotive components, this gasket carries the manufacturer part number 85030101 and the OEM equivalent 850‑301‑01, guaranteeing direct compatibility with original equipment specifications. The machined exterior surface is finished to a smooth, uniform texture that promotes consistent sealing and minimizes the chance of fluid ingress. In addition, the gasket’s plastic composition is inherently resistant to oil, coolant, brake fluid, and mild solvents, which helps maintain its integrity over extended service intervals. Customer feedback on major retail platforms reflects a strong satisfaction rate, with an average rating of 4.5 stars out of 5 based on 28 verified reviews, many of which cite the gasket’s durability, ease of installation, and perfect fit as key advantages. Whether you are a professional technician working in a high‑volume shop or a hobbyist performing a weekend repair, the JAZ 12‑Hole Flange Gasket offers a cost‑effective solution that does not compromise on performance or longevity.
![[Product front view showing all components]](https://www.richmart.store/wp-content/uploads/2026/06/1457d98df3484beeafaa10a80bc02ab4.jpg)
Usage
The primary application for the JAZ 12‑Hole Flange Gasket is to provide a reliable seal between the axle flange and adjoining components such as differential housings, wheel hubs, or transmission adapters. In racing environments, where engines and drivetrains are subjected to extreme thermal cycles and aggressive vibration, the gasket’s ability to maintain a consistent seal is critical for preventing fluid loss, protecting bearings, and preserving overall drivetrain efficiency. For everyday automotive repair, the gasket is typically installed during axle replacement, differential overhaul, or when refurbishing a worn flange that has lost its original sealing capability. The plastic material’s resistance to common automotive fluids means that the gasket can be used in both gasoline‑ and diesel‑powered vehicles without fear of degradation.
Installation steps are straightforward: first, clean the flange surface thoroughly to remove any old gasket residue, debris, or corrosion. Next, align the gasket with the twelve pre‑drilled holes, ensuring that the round profile sits flush against the mating surface. Apply a thin layer of compatible sealant if recommended by the vehicle manufacturer, then insert and tighten the bolts to the specified torque values, usually ranging from 70 to 90 Nm depending on the application. The gasket’s lightweight nature reduces the overall unsprung mass of the axle, which can contribute to improved handling dynamics in performance vehicles. Because the part matches OEM dimensions, no additional modifications or custom machining are required, making it an ideal drop‑in replacement for both factory service and aftermarket upgrades. The gasket also performs well in off‑road trucks, light commercial vehicles, and any platform that benefits from a durable, chemical‑resistant seal.
Why Choose Us
When you select the JAZ 12‑Hole Flange Gasket, you are investing in a product that benefits from a rigorous quality‑control process and a commitment to engineering excellence. Each gasket is produced in a climate‑controlled facility where temperature and humidity are monitored to ensure that the plastic material retains its intended properties throughout the molding and machining stages. Precision CNC equipment is used to achieve tolerances within ±0.001 inches, guaranteeing that every hole aligns perfectly with the standard 12‑hole pattern and that the overall dimensions remain consistent from batch to batch. JAZ conducts comprehensive testing on each production run, including compression set analysis, chemical resistance evaluation, and pressure‑seal verification on simulated axle assemblies.
Beyond the technical specifications, JAZ provides a robust warranty that covers any manufacturing defects for a full year from the date of purchase, reinforcing confidence in the product’s durability. The company’s customer service team is staffed with experienced engineers who can assist with fitment queries, installation advice, and troubleshooting, ensuring that you receive the support you need throughout the product’s lifecycle. JAZ also embraces environmentally responsible manufacturing practices, utilizing recyclable plastics and minimizing waste in the production process. By adhering to both OEM standards and sustainable principles, JAZ delivers a gasket that not only meets the performance expectations of demanding automotive professionals but also aligns with the growing demand for greener automotive solutions. Choosing JAZ means you receive a product that reduces downtime, prevents costly re‑work, and contributes to the overall reliability of your vehicle’s drivetrain.
Key Features
- Precision‑machined round shape ensures uniform pressure distribution for a leak‑free seal.
- High‑grade plastic resists oil, coolant, brake fluid, and mild chemicals, extending service life.
- Lightweight construction (0.32 oz) reduces unsprung weight while maintaining structural strength.
- Exact OEM fit (part number 850‑301‑01) provides a direct replacement for standard 12‑hole flanges.
- One‑year limited warranty and dedicated technical support for hassle‑free ownership.
FAQ
What vehicles are compatible with the 12‑Hole Flange Gasket?
The gasket conforms to the OEM part number 850‑301‑01, which is used across a broad spectrum of passenger cars, light trucks, and performance vehicles. It fits any axle that employs a twelve‑hole flange configuration, whether the application is a front‑axle drive shaft, rear‑axle differential, or a transmission adapter. To verify compatibility with a specific make and model, consult the vehicle’s service manual, check the part cross‑reference list, or contact JAZ technical support with the vehicle identification number (VIN) for a precise match. In addition, the gasket’s design for racing applications means it has been tested on high‑performance platforms that demand precise fit and durability, making it a suitable upgrade for enthusiasts seeking enhanced reliability without sacrificing OEM compatibility.
Can I install the gasket myself, or do I need a professional?
Installation of the JAZ 12‑Hole Flange Gasket is designed to be straightforward for anyone with basic mechanical aptitude. The process involves cleaning the flange surface, aligning the gasket with the twelve pre‑drilled holes, and tightening the bolts to the manufacturer’s torque specifications. While many DIY enthusiasts successfully complete the installation using standard hand tools, a professional mechanic can ensure that torque values are exact, that the flange surface is perfectly prepared, and that any ancillary components (such as seals or bearings) are correctly positioned. If you are uncertain about any step, seeking assistance from a qualified technician is advisable to guarantee optimal performance. The gasket’s vehicle‑specific fit type means it will match the original design parameters, reducing the risk of mis‑alignment that could otherwise lead to leaks or premature wear.
How does the plastic material compare to metal gaskets?
Plastic gaskets like the JAZ 12‑Hole model offer several distinct advantages over traditional metal gaskets. The lighter weight contributes to reduced unsprung mass, which can improve handling and ride quality, especially in performance and racing applications. Plastic also provides superior vibration damping, helping to minimize noise and wear on surrounding components. Additionally, the material’s inherent resistance to corrosion from automotive fluids eliminates the need for special surface treatments that metal gaskets often require. While metal gaskets may be preferred in extreme high‑temperature environments, the JAZ plastic gasket delivers reliable sealing performance for the vast majority of automotive and racing scenarios, combining durability with ease of installation. Its OEM‑equivalent part number (850‑301‑01) ensures that it meets the same dimensional tolerances as a metal counterpart, while offering the added benefits of chemical resistance and simplified handling.
What warranty does JAZ provide for this gasket?
JAZ offers a limited one‑year warranty that covers any defects in material or workmanship. The warranty is valid from the date of purchase and requires proof of purchase, such as an invoice or receipt. It does not cover damage resulting from improper installation, misuse, or exposure to conditions beyond the gasket’s design specifications. If a manufacturing defect is identified within the warranty period, JAZ will either replace the gasket at no additional cost or provide a full refund, depending on availability and customer preference. For warranty claims, customers should contact JAZ customer service with the relevant documentation and a description of the issue. The company’s after‑sales support team is trained to handle technical inquiries promptly, ensuring that any concerns are resolved quickly and that the gasket continues to perform as intended throughout its service life.




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