30Pc Metric Thread Repair Kit M3–M11 | 304 Stainless Steel
30Pc Metric Thread Repair Kit M3–M11 | 304 Stainless Steel
Restore Stripped Threads Quickly & Confidently
Whether you're working on an engine block, aluminum housing, or any soft-metal component, this 30-Piece Metric Thread Repair Insert Kit gives you everything you need to rebuild damaged or worn-out tapped holes to factory-strength condition. Ideal for professional mechanics and serious DIY enthusiasts alike, this all-in-one kit covers the most common metric thread sizes — M3, M4, M7, M9, and M11 — so you're always prepared on the job or in the garage.
Made in Mainland China.
Why Choose This Thread Repair Kit?
- Premium 304 Stainless Steel Inserts — Highly resistant to corrosion and wear, these wire thread inserts deliver a durable, long-lasting repair that often outperforms the original thread.
- Complete All-in-One Kit — Includes wire thread inserts, insert installation tools, twist drill bits, thread taps, and lug-breaking tools. No need to source individual pieces.
- Wide Metric Size Coverage — Handles M3, M4, M7, M9, and M11 thread sizes, making it versatile across automotive, motorcycle, marine, and general mechanical applications.
- Strengthens Soft Metal Threads — Creates a stronger internal thread in aluminum, magnesium, cast iron, and other soft metals, protecting tapped holes against future wear and damage.
- Organized Storage Case Included — Compact carry case (18 × 12 × 3 cm) keeps every component sorted and easy to access, perfect for the workshop bench or a tool bag.
- Lightweight & Portable — At just 150 g (5.29 oz), the entire kit travels easily to job sites or remote locations.
Product Specifications
| Material | 304 Stainless Steel |
| Color | Silver |
| Thread Sizes | M3, M4, M7, M9, M11 |
| Total Pieces | 30 |
| Package Dimensions | 18 × 12 × 3 cm / 7.09 × 4.72 × 1.18 in |
| Package Weight | 150 g / 5.29 oz |
| Country of Origin | Mainland China |
What's in the Box?
- Wire Thread Inserts (multiple metric sizes: M3, M4, M7, M9, M11)
- Insert Installation Tools
- Twist Drill Bits
- Thread Taps
- Lug Breaking Tools
- Organized Storage Case
Common Applications
- Automotive engine and transmission repairs
- Motorcycle and small engine maintenance
- Aluminum cylinder head bolt hole restoration
- General machining and fabrication work
- Industrial equipment maintenance
For best practices on safe hand tool and fastener use in professional and home workshop environments, refer to the OSHA Hand & Power Tools Safety Guidelines.
Frequently Asked Questions
Q: What metric thread sizes does this repair insert kit cover?
A: This 30-piece metric thread repair insert kit includes inserts and tooling for M3, M4, M7, M9, and M11 thread sizes, covering the most common sizes found in automotive, motorcycle, and general mechanical applications.
Q: Are these thread inserts suitable for use in aluminum and other soft metals?
A: Yes. The 304 stainless steel wire thread inserts are specifically designed to restore and strengthen internal threads in soft metals such as aluminum, magnesium, and cast iron, creating a more durable threaded connection than the original material.
Q: Does the kit include all the tools needed to complete a thread repair?
A: Absolutely. The kit is fully self-contained and includes wire thread inserts, installation tools, twist drill bits, thread taps, and lug-breaking tools — everything required to complete a professional-quality metric thread repair from start to finish.
Q: How do I store and transport the kit safely?
A: The kit comes in a compact organized storage case measuring 18 × 12 × 3 cm, keeping all components sorted and secure. At only 150 g, it's lightweight and easy to carry to job sites or keep in a tool bag.