Helical Threaded Insert Kit EZ Lok Steel 304 Pack of 10

Description

Product Overview

The E-Z Lok Helical Threaded Insert Kit is engineered for professionals and DIY enthusiasts who need a dependable solution for repairing or reinforcing damaged threads in soft metals. Each kit contains ten high‑quality 304 stainless steel inserts sized #4‑40, offering exceptional corrosion resistance and the ability to withstand temperatures up to 800°F. The inserts feature a helical coil design that expands when installed, creating a strong, permanent thread that mimics the original geometry of the tapped hole.

Manufactured from premium 304 stainless steel, the inserts provide a balance of strength and flexibility, allowing them to conform to the surrounding material while maintaining structural integrity. This makes them ideal for use in aluminum, cast iron, magnesium, and other soft‑metal substrates where traditional thread repair methods often fail. The kit also includes a precision‑engineered STI tap, a drill bit matched to the insert diameter, an installation tool for easy insertion, and tang break tools to remove the tang after installation, ensuring a seamless finish.

Designed with ease of use in mind, the kit follows a straightforward three‑step process: drill the pilot hole, tap the thread using the included STI tap, and install the coil insert with the dedicated tool. The tang break tool then removes the excess tang, leaving a clean, fully functional thread ready for immediate use. This system eliminates the need for costly re‑machining or component replacement, saving both time and money while extending the service life of equipment.

Usage

These helical inserts excel in a variety of industrial and hobbyist applications. In aerospace maintenance, they are used to restore fastener locations on lightweight aluminum panels, ensuring critical components remain securely attached. In automotive repair shops, technicians rely on the kit to fix stripped threads in engine blocks, transmission housings, and suspension parts, where downtime must be minimized. Marine environments benefit from the stainless‑steel construction, which resists saltwater corrosion, making the inserts suitable for boat hulls, deck fittings, and pump housings.

Beyond heavy‑duty settings, the kit is also perfect for hobbyist projects such as model aircraft construction, custom CNC‑machined parts, and 3D‑printed metal components that require durable threaded connections. The versatility of the kit allows users to address thread damage in both new builds and legacy equipment, providing a universal solution that adapts to a wide range of thread sizes and material types.

Why Choose Us

E‑Z Lok has a reputation for delivering high‑performance fastening solutions that meet rigorous industry standards. Our Helical Threaded Insert Kit is backed by a comprehensive quality assurance program, including material certification, dimensional testing, and performance validation under extreme temperature and corrosive conditions. Each insert undergoes a strict inspection process to guarantee consistent coil geometry and tensile strength, ensuring reliable thread restoration every time.

Customer support is a cornerstone of the E‑Z Lok experience. Our technical assistance team is available to guide users through the installation process, troubleshoot any issues, and provide recommendations for optimal tool selection. We also offer a satisfaction guarantee, allowing customers to return any defective components for replacement or refund, reinforcing our commitment to durability and user confidence.

Key Features

• High‑grade 304 stainless steel provides superior corrosion resistance and temperature tolerance.
• Helical coil design expands to fill damaged threads, delivering a strong, permanent repair.
• Complete kit includes drill, STI tap, installation tool, and tang break tools for hassle‑free installation.
• Suitable for soft metals such as aluminum, cast iron, and magnesium, expanding application versatility.
• Backed by responsive technical support and a satisfaction guarantee for peace of mind.

FAQ

Can these inserts be used in hardened steel?

While the kit is optimized for soft metals, the stainless‑steel inserts can be employed in hardened steel if the pilot hole is properly prepared and the tap is matched to the material’s hardness. However, for best results and to avoid potential galling, we recommend using a dedicated hardened‑steel insert kit for such applications.

What is the maximum torque these inserts can handle?

In laboratory testing, the 304 stainless‑steel helical inserts have demonstrated a tensile strength of approximately 1,200 psi, which translates to a safe torque capacity of around 30 in‑lb for #4‑40 threads. This is sufficient for most fastening scenarios in soft‑metal assemblies, but users should always verify torque requirements against specific equipment specifications.

Do I need any special equipment to install the inserts?

No special equipment is required beyond the tools included in the kit. The drill bit creates the pilot hole, the STI tap cuts the thread, the installation tool drives the coil into place, and the tang break tool removes the excess tang. All tools are designed for ergonomic use and are compatible with standard hand‑held power drills and torque wrenches.

How do I ensure a proper fit when installing the insert?

Begin by selecting a drill bit that matches the insert’s core diameter, then drill a clean, perpendicular hole to the recommended depth. Use the STI tap to cut the thread, ensuring the tap is fully engaged and lubricated. Insert the coil using the installation tool, applying steady pressure until the insert seats flush with the surface. Finally, break off the tang with the provided tool to reveal a smooth, functional thread.

Is there a warranty on the kit?

Yes, E‑Z Lok offers a one‑year limited warranty covering material defects and manufacturing errors. If any component fails to meet quality standards, customers can contact our support team for a replacement or refund, subject to proof of purchase and inspection of the returned item.