5721-4 HELICOIL Thread Repair Drill Kit

Review HELICOIL Thread Repair Kit Size 1/4-20 Drill 17/64 Inch .2656

The Helicoil 5721-4 Thread Repair Kit is an essential tool for repairing stripped or damaged threads on fasteners commonly used in automotive applications. This particular kit is specifically designed for 4-20 UNF (Unified National Threads) with a pitch of 17 threads per inch and a thread size of 64, which is also referred to as a 17/64 inch thread. The Helicoil repair process utilizes a unique, helically-designed insert that is threaded to match the existing damaged thread. This threaded insert is designed to be installed using a drill, and the kit includes a tap drill size of 2656 (1/16 inch) for creating the new thread pocket for the insert.

The Helicoil 5721-4 Thread Repair Kit comes with 10 thread repair inserts, five with a left-hand helix and five with a right-hand helix, as well as a tap drill and a drill bit for installing the inserts. The tap drill features a 3/8 inch shank that can be easily attached to a standard drill for precision drilling. The inserts are made of high-strength, heat-treated steel, ensuring durability and resistance to future damage. This repair kit is suitable for a wide range of applications, making it a valuable addition to any mechanic's toolbox or DIY enthusiast's collection. If you've encountered a stripped or damaged thread on a 17/64 UNF fastener, the Helicoil 5721-4 Thread Repair Kit is the ideal solution. With its simple, easy-to-use design and effective thread repair capabilities, you'll be able to quickly and efficiently restore the functionality of your fasteners, saving you time and money compared to the cost of replacing them entirely.

This Helicoil repair kit operates based on the Helicoil insert principle that threadedly fits into the pre-drilled hole, utilizing helical threads, mimicking the original thread form. The inserts are made of high-strength, heat-treated steel, which ensures the repaired threads have a superior holding power compared to the original thread. Installing the Helicoil inserts is typically accomplished through either drilling a new tapered threaded hole or using an existing threaded hole if the helix angle and pitch are suitable for the repair. With the 5721-4 kit, the tap drill is 3/8 inch, designed specifically for the size and thread pitch combination of 17/64 UNF (4-20) threads. The Helicoil repair process is commonly used in automotive, industrial, and DIY applications where repairing damaged threaded fasteners is necessary, and the ability to use a drill for installation is beneficial. The kit comes with 10 thread repair inserts, meaning that this repair kit is ready to be used for multiple repairs, making it a cost-effective and long-lasting solution compared to replacing the damaged or stripped fasteners altogether.

Helicoil 5721-4 thread repair kit is a product widely used for repairing stripped or damaged threads. Here are some pros and cons to help you make an informed decision before making a purchase:

1. Easy to use: Helicoil thread repair kits are known for their ease of use. The kit includes all the necessary tools, making the repair process straightforward and efficient for users.

2. saves time and cost: Repairing damaged threads with a Helicoil kit is often cheaper and faster than replacing the entire part. It can save significant time and resources, especially for industrial equipment or machinery.

3. Robust: Helicoil inserts are made of high-strength materials, which can withstand heavy loads and high torque, making them ideal for use in industrial applications.

4. Versatile: The Helicoil 5721-4 kit is suitable for repairing threads with a pitch of 4-20 WUN and a drill size of 17/64-2656. This means it can be used in a variety of applications across multiple industries.

1. Limited thread sizes: Helicoil 5721-4 is only suitable for repairing threads with a specific pitch and drill size. Make sure the kit matches the thread size you need before making a purchase.

2. May not repair severely damaged threads: In some cases, threads that are heavily damaged or have been stripped beyond a certain point may not be repairable with a Helicoil kit.

3. Limited lifespan: Helicoil inserts do not last forever. Depending on the load and usage conditions, they may need to be replaced periodically to maintain the desired thread condition.

Helicoil thread repair kits, including the 5721-4 kit, offer various benefits such as ease of use, cost-effectiveness, robustness, and versatility. However, they also come with limitations, such as being suitable for specific thread sizes, and having a limited lifespan. Before making a purchase, make sure the thread size requirements match the kit's specifications and consider the application's load and usage conditions to determine if a Helicoil repair is the best option.

If you have stripped or damaged threads with a pitch of 4-20 WUN and a drill size of 17/64-2656, and the damage is not severe, a Helicoil 5721-4 thread repair kit could be a cost-effective and efficient solution to restore the thread function. Make sure to follow the manufacturer's instructions carefully to ensure optimal results.

Details:

A picture says a thousand words, please refer to pictures for full condition and specific item details. If it is not pictured, then included in this listing. Helicoil 5721-4 thread repair kit size 1/4-20 drill 17/64 .2656.

specifications threadtoollot:

• brand: Helicoil
• mpn: 5721-4
• type: Heli-coil Insert
• set or single item: Set

shipping threadtoollot:

• service: standard, expedited
• class: standard, expedited
• transit: 3-10 days
• type: fixed

offer threadtoollot:

• prices: $34.19–$59.99
• item condition: New
• in stock #: 5
• started: november 19, 2024
• availability: in stock
• sold #: 24
• options: ship-to-home

general threadtoollot:

• category: Auto Parts > Supplies > Hand > Threading Tools

payments threadtoollot:

• other
• wallet: google-pay
• credit card: visa

returns threadtoollot:

• policy: no returns

seller threadtoollot:

• # reviews: 930
• city: tulsa, oklahoma
• rating: 97.3%