4640-11 HELICOIL Heli Coil Thread Repair Tap Drill Inserts

Review HELICOIL Heli-coil M11 1.25 Metric Thread Repair Kit Tap Drill Inserts Usa

Introducing the Helicoil 4640-11 Heli-Coil M11 1.25 Thread Repair Kit, an essential tool for repairing damaged or worn-out threads in various applications. This versatile repair kit is engineered to provide a reliable and long-lasting solution for restoring threads on bolts, studs, and other fasteners.

The Helicoil 4640-11 kit includes a comprehensive array of components designed to accommodate M11 (1.25 UNC) threads. It consists of Helicoil inserts, tap drill inserts, and a tap drill bit. The Helicoil inserts come pre-threaded and are made from high-strength, low-alloy steel, ensuring superior tensile and shear strength. These inserts are specifically designed to resist galling and seizing, ensuring a secure and efficient thread repair.

The tap drill inserts, also included in the kit, are used to create a new pilot hole for the Helicoil inserts. Crafted from heat-treated steel, these inserts provide superior drilling performance and durability. The tap drill bit, which is also part of the kit, is engineered to work seamlessly with the tap drill inserts, ensuring accurate and consistent hole size and shape.

Installing the Helicoil inserts is a straightforward process that can be accomplished using standard hand tools. The kit includes detailed instructions to guide users through the process, ensuring a successful repair every time. With its robust design and high-quality components, the Helicoil 4640-11 Heli-Coil M11 1.25 Thread Repair Kit is an indispensable tool for mechanics, machinists, and DIY enthusiasts who require a reliable and efficient solution for thread repair.

In summary, the Helicoil 4640-11 Heli-Coil M11 1.25 Thread Repair Kit is a comprehensive solution for restoring damaged or worn-out threads on M11 (1.25 UNC) bolts, studs, and other fasteners. It includes Helicoil inserts, tap drill inserts, and a tap drill bit, along with detailed instructions for easy installation. This high-quality, versatile repair kit is designed to provide superior strength, durability, and resistance to galling and seizing, making it an essential tool for professionals and DIY enthusiasts alike.

Helicoil 4640-11 heli-coil M11 1.25 thread repair kits are designed to repair stripped or damaged threads in various applications. Here are some pros and cons of buying this particular kit:

1. Versatile: The Helicoil 4640-11 kit can be used to repair threads in a wide range of applications, including engine blocks, cylinder heads, and transmission cases.

2. Easy to use: The kit comes with a tap drill insert, which makes the thread repair process relatively easy and straightforward.

3. Durable: Helicoil threads are known for their strength and durability, making them an excellent choice for repairing critical threads.

4. Time-saving: Using a Helicoil repair kit can save time and money compared to replacing the damaged part altogether.

1. Cost: Helicoil repair kits can be more expensive than other thread repair methods, such as tapping or welding.

2. Requires specific tools: To use the Helicoil kit, you will need access to a drill, a tap and die set, and possibly other specialized tools.

3. Limited thread sizes: The 1.25 thread size in this particular kit may not be suitable for all applications.

The Helicoil 4640-11 M11 1.25 thread repair kit offers several advantages, including ease of use, durability, and versatility. However, it also comes with some drawbacks, such as cost and the need for specific tools. Ultimately, the decision to purchase this kit depends on the specific needs of your application and your budget.

If you need to repair stripped or damaged threads in a critical application and have the budget for it, the Helicoil 4640-11 M11 1.25 thread repair kit is an excellent choice. However, if you have less demanding applications or a limited budget, alternative thread repair methods, such as tapping or welding, may be more cost-effective. It's essential to evaluate your specific application requirements and budget before making a purchase decision.

Details:

See photos for exact contents and condition. Used condition. Genuine heli-coil m11 x 1.25 metric thread repair kit. Includes sit tap, drill bit, installation tool, tang break tool 4640-11, and inserts shown.

Industrial / machinist automotive thread repair tooling.

specifications threadtoollot:

• brand: Helicoil
• mpn: 4640-11
• type: Heli-coil Insert
• system of measurement: Metric
• set or single item: Set

payments threadtoollot:

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

offer threadtoollot:

• price: $66.49
• item condition: New
• availability: in stock
• in stock #: 1
• best offers: true
• options: ship-to-home
• sold #: 7
• started: may 24, 2026

returns threadtoollot:

• policy: no returns

shipping threadtoollot:

• class: standard
• service: usps ground advantage
• transit: 4-8 days
• type: fixed
• carrier: usps

general threadtoollot:

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

seller threadtoollot:

• rating: 100.0%
• city: saint louis, missouri
• # reviews: 64