M4 Thread Repair Insert Kit 25-Pc | Screw Socket Set

Restore Stripped & Damaged M4 Threads with Confidence

This 25-piece M4 Thread Repair Insert Kit gives you everything you need to bring damaged, stripped, or crossed threads back to full strength — in steel, iron, aluminum, and other metal materials. Whether you're working on processing machinery, automotive components, or general fabrication, this all-in-one kit keeps your work moving without expensive replacements.

Key Features

• High-Quality Construction: Premium materials and precision processing deliver more efficient thread restoration than most standard alternatives.
• Wide Compatibility: Suitable for general steel materials and non-ferrous alloys, including blind hole processing — ideal for various types of processing machinery.
• Supports Both Insert Types: Compatible with ordinary steel wire screw sleeves and self-locking types.
• Convenient Storage: Includes a transparent plastic storage box to keep all components organized, protected, and easy to carry to any job site.
• Complete 6-Step Process Kit: Follows a structured process route — Drilling → Tapping → Inspection → Assembly → De-handling → Final Inspection — for reliable, professional results every time.

Specifications

• Item Type: Thread Repair Insert Set
• Thread Size: M4
• Applicable Types: Ordinary steel wire screw sleeve, self-locking type
• Box Material: Transparent plastic
• Scope of Application: General steel materials, non-ferrous alloys, blind hole processing, processing machinery
• Country of Origin: Made in China

What's in the Box

• 1 × Wrench
• 1 × Breaker
• 1 × Tap
• 1 × Drill Bit
• 1 × Hex Socket Wrench
• 20 × Screw Sockets (M4 Thread Insert)

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Frequently Asked Questions

Q: What thread size does this M4 thread repair insert kit support?

A: This kit is specifically designed for M4 metric threads. It includes 20 screw socket inserts sized for M4, along with all the tools needed to drill, tap, and install the inserts correctly in steel, aluminum, and other metal materials.

Q: Can this thread repair kit be used on aluminum or soft metal components?

A: Yes! The kit is suitable for general steel materials and non-ferrous alloys, including aluminum and other soft metals. It also supports blind hole processing, making it versatile for a wide range of machining and repair applications.

Q: Does this kit include all the tools needed to complete a thread repair?

A: Absolutely. The kit comes complete with a drill bit, tap, wrench, breaker, hex socket wrench, and 20 M4 screw socket inserts — everything required to carry out the full 6-step thread repair process from start to finish, all stored in a convenient transparent plastic box.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.