M7–M11 304 Stainless Steel Wire Thread Insert Screw Sleeve 20–50pcs

JARBLUE M7–M11 Stainless Steel Wire Thread Inserts – Professional Thread Repair Sleeves

Restore stripped, worn, or damaged threads quickly and reliably with the JARBLUE M7–M11 Wire Thread Insert Set. Engineered from premium 304 stainless steel, these screw bushings create a stronger, more durable thread than the original — ideal for metalworking, machine maintenance, and DIY repair projects. Available in convenient pack sizes of 20 or 50 pieces, in M7, M9, and M11 sizes with 1.0 pitch and 1D–3D lengths.

Made in Mainland China.

Why Choose JARBLUE Wire Thread Inserts?

• High-Grade 304 Stainless Steel – Corrosion-resistant and built for long-lasting performance in demanding environments
• CE Certified – Meets recognized quality and safety standards
• Multiple Size Options – M7, M9, and M11 with 1.0 pitch; 1D, 2D, and 3D lengths to suit various thread depths
• Restores Stripped Threads – Brings damaged threads back to full load-bearing capacity
• Customizable Quantities – Choose 20-piece or 50-piece packs depending on your project needs
• Wide Application – Compatible with aluminum, cast iron, magnesium, plastics, and more
• Easy to Install – Standard wire thread insert installation; no special training required
• No Hazardous Chemicals – Contains no high-concern chemicals

Product Specifications

Common Applications

• Repairing stripped threads in engine blocks, gearboxes, and housings
• Reinforcing threads in aluminum or soft-metal components
• Industrial machinery and equipment maintenance
• Automotive and aerospace fabrication and repair
• DIY metalworking and workshop projects

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Learn more: OSHA on personal protective equipment

Frequently Asked Questions

Q: What materials are JARBLUE M7–M11 wire thread inserts compatible with?

A: These 304 stainless steel wire thread inserts are compatible with a wide range of base materials including aluminum, cast iron, magnesium alloys, plastics, and composites. They are especially useful for repairing threads in softer metals that are prone to stripping or wear over time.

Q: What is the difference between 1D, 2D, and 3D wire thread insert lengths?

A: The "D" refers to the nominal diameter of the insert. A 1D insert is one times the diameter in length, 2D is two times, and 3D is three times. Longer inserts (2D or 3D) provide greater thread engagement and load-bearing strength, making them ideal for high-stress or heavy-duty fastening applications.

Q: Do I need any special tools to install these wire thread inserts?

A: Installation typically requires a tap (to prepare the hole to the correct thread specification) and a standard wire thread insert installation tool or driver. These are widely available tools compatible with metric wire thread inserts of this type. No advanced machining skills are required for most repair applications.

Q: How many pieces come in a pack?

A: These wire thread inserts are available in packs of 20 or 50 pieces, giving you the flexibility to stock up based on the scale of your project or repair work.

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.