88/131 Pcs Thread Repair Kit M5–M12 Wire Insert Set

Restore Stripped Threads Like a Pro — 88 or 131-Piece Kit

Whether you're working on an engine block, chassis fasteners, motorcycle hardware, or interior trim components, this comprehensive thread repair kit gives you everything needed to bring damaged or stripped threads back to full strength. Thanks to precise wire thread inserts, the restored thread is often stronger than the original — making this an essential addition to any garage or workshop tool collection.

Available in an 88-piece set (M6, M8, M10) and a larger 131-piece set (M5, M6, M8, M10, M12), there's a configuration for light maintenance jobs and demanding professional repairs alike. Made in China.

Key Features

• Wide size range: Covers M5 through M12 metric threads for versatile automotive and mechanical applications
• High hardness inserts: HRC 60–63 hardness rating ensures long-lasting durability under heavy loads
• Complete tooling included: Drill bits, taps, installation tools, break-pin tools, and a T-wrench or hex key — no additional tools required
• Stronger than original: Narrow tolerances mean the repaired thread typically exceeds original holding strength
• Broad compatibility: Ideal for engines, throttle bodies, seat frames, door locks, fenders, interior trim, motorcycles, bicycles, and general metal fabrication
• 131-piece set includes storage case: Keep every component organized and protected between uses
• Metal construction: Apply rust-preventive oil or grease to metal components for long-term protection when stored

88-Piece Set Contents (M6 / M8 / M10)

• 3× Taps: M6×1.0×10.8mm, M8×1.25×10.8mm, M10×1.5×13.5mm
• 3× Drill Bits: 6.3 / 8.4 / 10.4mm
• 3× Break-Pin Tools
• 75× Wire Thread Inserts: M6×1.0 (×25), M8×1.25 (×25), M10×1.5 (×25)
• 1× T-Wrench

131-Piece Set Contents (M5 / M6 / M8 / M10 / M12)

• 5× Twist Drill Bits
• 5× Installation Tools
• 5× Break-Pin Tools
• 5× Taps
• 1× Hex Key
• 25× Wire Thread Inserts M5×0.8×6.7mm
• 25× Wire Thread Inserts M6×1.0×8.0mm
• 25× Wire Thread Inserts M8×1.25×10.8mm
• 25× Wire Thread Inserts M10×1.5×13.5mm
• 10× Wire Thread Inserts M12×1.75×16.3mm
• 1× Storage Case

How to Use — 6 Simple Steps

1. Drill out the damaged thread using the correctly sized drill bit (supplied)
2. Tap the re-drilled hole using the supplied tap
3. Load the coiled wire insert into the installation tool
4. Screw the insert into the casting
5. Use the break-pin tool to snap off the installation tang
6. Thread is fully restored and ready to use

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Learn more: FuelEconomy.gov on vehicle maintenance

Frequently Asked Questions

Q: What sizes of threads can this kit repair?

A: The 88-piece thread repair kit covers M6, M8, and M10 metric sizes. The larger 131-piece kit expands coverage to M5, M6, M8, M10, and M12, making it suitable for a wider range of automotive, motorcycle, and general metalwork applications.

Q: Is any additional tooling needed to complete a thread repair?

A: No. Each kit is fully self-contained — it includes the drill bits, taps, wire thread inserts, installation tools, break-pin tools, and a wrench. You simply need a standard drill to drive the supplied drill bits.

Q: Can this thread repair kit be used on materials other than automotive metal?

A: Yes. While the kit is optimized for engine blocks and automotive components, it is equally effective on any suitable metal substrate, including motorcycle frames, bicycle components, machinery housings, and general metal fabrication work where metric threads need to be restored.

Q: How do I prevent the metal tools from rusting during storage?

A: Apply a thin coat of rust-preventive oil or grease to all metal components before storing. This creates a barrier that keeps out moisture and corrosive elements, keeping your kit in excellent condition for the long term. The 131-piece set also includes a dedicated storage case to help keep everything organized and protected.

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.