M12x1 25 Threads of 2025
Best Choice1
TIME-SERTTIME-SERT M12x1.25 Thread Repair kit p/n 1212
Main highlights- Time-Sert M12x1.25 thread repair kit p/n 1212
- Professional thread repair kits and inserts by TIME-SERT Made in USA
- Note: Not for spark plug repair see Time-Sert p/n 4212-125
- Kit includes Drill, counterbore, tap , install driver and 5 inserts 15mm length
9.8Exceptional
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Value for Money2
SENNMONNSENNMONN M12x1.25 Thread Repair Kit with Insert HSS Drill, Tap, Counterbore, Installation Driver, Metric, 10PCS Stainless Steel Insert M12X1.25X15MM
Main highlights- PROFESSIONAL QUALITY: Special design counterbore is used to cut a recessed lip which takes the flange of the inserts.Makes your work much better.
- PRECISION RESTORATION: Our Thread Repair kit is Used to Repair or Replace Damaged or Stripped Internal Screw Threads. Ideal for a wide range of uses, this kit is particularly well-suited for engine repairs and various automotive applications.
- KIT INCLUDES: Drill x1, Counterbore x1, Tap x1, Install Driver x 1, M12X1.25X15MM Inserts x10. with Custom EVA Box.
- DURABLE STAINLESS STEEL INSERTS: Solid steel insert made insert creates stronger internal thread and much stronger and durable than helicoil.
- CUSTOM EVA BOX: Comes with a specially designed EVA packaging box tailored for the kit, offering secure and organized storage, as well as easy portability.
9.7Exceptional
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3
BILITOOLS18% OffBILITOOLS M12x1.25 Thread Repair Kit, HSS Drill Helicoil Repair Kit Metric
Main highlights- Used for repairing damaged or stripped internal threads and creating a stronger internal thread.
- Thread repair kit includes a collection of tools including HSS drill, tap, thread inserts, installation tool, break pin tool.
- Suitable for all metals, composites, polymers and other materials. Our thread repair kit can be widely used in automotive and plumbing applications.
- Attention: Before you buy this kit, please make sure which size do you need. If you don't know, Please see the picture 6.
- All the parts are organized in a convenient iron case for easy transport and storage between jobs.
- 304 Stainless thread inserts create longer lasting durable threads, increase the possibility of higher torque application in weaker metals. 135° apex angle of twist drills, with stronger metal penetration and higher efficiency
9.4Excellent
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4
HelicoilHeli-Coil 554312 M12X1.25 Metric Kit
Main highlights- Package Dimensions: 17.272 L x 2.032 H x 10.16 W (centimeters)
- Metric Fine Thread Repair Kit
- Made in China
- 6 Inserts Per Kit
9.3Excellent
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5
BZBMGMOBZBMGMO M12x1.25 * 17 Thread Repair Kit, Total Length Up to 11 Inches, Car Engine/Spark Plug Repair Kit, 10 Stainless Steel Inserts, with a 150mm Extension Rod
Main highlights- 4，Complete package includes: 1 Drill, 1 conterbore, 1 tap, 1 install driver，1 150mm Extension Rod， 10 inserts 17mm length
- 3，Contrary to the phenomenon of messy teeth and tooth extraction that often occur with traditional threaded sleeves, this set of tools will not occur, and even a novice can easily complete it in the shortest time
- 2，Specifically developed for automotive engine/spark plug thread repairs, typically used for deep recessed thread repairs or when repairing threads on components to avoid excessive disassembly due to interference
- 1，Install new stainless steel spark plug thread inserts in place of original threads
9.1Excellent
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6
CENFORGECENFORGE M12x1.25 Helicoil Thread Repair Kit, Metric HSS Drill Helicoil Repair Kit for Rethreading Internal Threads with Carry Case, 15PCS
Main highlights- [Versatile Material Compatibility] Designed to deliver reliable thread repairs on a wide range of materials, including aluminum, iron, carbon steel, bronze, and magnesium, making it ideal for automotive, plumbing, and industrial applications.
- [User-Friendly Design] The precision 135° drill bit effortlessly prepares threads for repair, allowing the installation tool to seamlessly fit inserts into damaged threads, while the breakoff tool ensures a clean, ready-to-use finish.
- [Portable & Organized Storage] Includes a durable carry case designed for easy transport and secure organization, keeping all tools and inserts neatly stored and ready for your next repair job.
- [High-Performance Materials] Featuring a high-speed steel drill bit for smooth, precise drilling and durable 304 stainless steel inserts designed for exceptional strength and long-lasting thread repairs.
- [Complete Thread Restoration Kit] Easily repair stripped, or worn internal threads with Cenforge's helicoil thread repair kit in M12x1.25 size. This comprehensive set includes 10 high-quality thread inserts, an installation tool, breaking tool, precision screw tap, durable drill bit, and a hex wrench – everything you need for professional-grade thread repairs.
9.0Excellent
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7
CamrusicCamrusic Spark Plug Thread Repair kit, M12x1.25 Inserts and M14x1.25 Tap Stainless Steel Thread Repair Tool for Automotive Engine
Main highlights- Thread Standard: These repair tools have standard thread sizes, suitable for repairing spark plugs with 14mm x 1.25mm threads
- Scope of Application: This is a great practical Spark Plug Thread Repair Kit, has great stable performance, standard size perfect fitment and reliable quality, can be widely used for gasoline engines, generators, diesel engines, etc. Saving labor and time
- Quality Reliable: Spark Plug and Inserts set is made of quality thick high speed steel and stainless steel material, which has high hardness and strength, great stable performance for easy drilling and repairing, high wear and heat resistance that is hard to break or damage, durable and reliable to be used for a long life.
- Practical Insets and Taps Set: Professional spark plug thread repair tools, including 10pcs M12 x 1.25 thread inserts and a M14 x 1.25 thread tap
- Excellent Material: These threaded inserts are made of stainless steel, with galvanized treatment, corrosion resistant and durable.
8.9Very Good
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8
NINEFOXNINEFOX Spark Plug Thread Repair Kit M12x1.25, Thread Spark Plug Thread Repair Kit, Efficiently Repair Damaged Spark Plug Threads in Gasoline Engines, Generators, Diesel Engines
Main highlights- Versatile Kit: Includes 10 thread inserts and 1 tap in your choice of m12x1.25 or m14x1.25 thread sizes to repair both taper seat and gasket seat spark plug assemblies. Suitable for a wide range of applications, this repair kit is a must-have tool for automotive enthusiasts and professionals alike.
- Restore Optimal Condition: Repaired threads ensure the best installation of spark plugs, enhancing engine performance.Timely repairs minimize the risk of failures due to loose or detached spark plugs.
- Portable and Compact: Designed for easy carrying and storage, ready to handle emergencies anytime, anywhere.
- Efficient Repair: Professionally designed tools that can swiftly repair damaged spark plug threads, significantly reducing repair time. Repair instead of replacing entire spark plugs or related components, minimizing downtime and costs.
- Easy to Use: Designed to simplify the repair process, making it accessible even for DIY enthusiasts. Compared to replacing entire spark plugs or components, using this kit for repairs can significantly reduce maintenance expenses.
- Durable Construction: Made from stainless steel inserts and high-speed steel taps, ensuring top performance even in harsh environments. With its robust design, versatility, and ease of use, this kit offers a practical and efficient solution for spark plug thread repairs.
- Dual Size Options: Option 1: 10PCS m12x1.25 thread inserts and 1pc m14x1.25 tap kit.Option 2: 10PCS m14x1.25 thread inserts and 1pc m16x1.25 tap kit choose the appropriate size based on your specific needs. Suitable for repairing 12mmx1.25mm or 14mmx1.25mm spark plug threads on gasoline engines, generators, and diesel engines.
8.6Very Good
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9
ANPTGHTANPTGHT M12x1.25 Thread Repair Kit, Helicoil Thread Inserts Taps Kit with HSS Drill Bits Compatible Hand Tool Set for Damaged Thread ＆ Auto Repairing(Metric)
Main highlights- 【Package Details Introduce】15pcs thread repair kit, all made according to professional standard, includes 1 twist drills, 1 screw taps, 1 installation tools, 1 breaking pin tools, 10 thread inserts, 1 hexagon wrench, and a Metal storage box.
- 【Material】The drill bits and screw taps are made from heat-treated high-speed steel (HSS) , The while thread inserts are made from 304 stainless steel.
- 【Function】Helicoil thread repair kit effortlessly restores stripped, damaged, or worn internal threads. It creates stronger internal threads in soft metals, protecting them from wear and damage
- 【Easy to Use】With a simple 3-step process—drill, tap, and install. The 135° apex angle ensures effective metal penetration for smooth insert placement. Use the installation tools for quick thread repairs, and the break-off tools for a clean finish, making threads ready for immediate use
- 【Application】Suitable for all metals, composites, polymers and other materials. Can be widely used in automotive and plumbing applications such as automotive engines, bearings, and metal holes etc.
8.5Good
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10
DPTOOLDPTOOL 12mm Back Tap Spark Plug Thread Repair Tool M12x1.25 Thread Chase Tap Kit 2Pack Length 5.27″ and 10.3"
Main highlights- Tips: Put it straight through the hole, expand it, back thread it 3-5x. Then reverse it in reverse, especially when it started getting tougher to turn, turning from side to side from time to time, at the same time, during the whole process, Just be sure to go slow. When u hit a hard patch, back it up a little then go forward again. After repeated operations, it is easy to remove the remaining material
- Short and Long SIzes: It contains 2pcs spark plug thread repair tools, detail size is: M12x1.25(5.27" length); M12x1.25(10.3" length), will be suitable for more models of vehicles
- No Shavings Drop Into Engine: Used grease on the threaded, so that it will trap any metal shavings within it and pull out with the device rather than drop into the cylinder chamber, not worry about stuff going down into the engine
- High Quality Material: Made of high quality 42CrMo steel, its material is equivalent to 4140 steel, with high strength and toughness, good hardenability, no obvious tempering brittleness, high fatigue limit and multiple impact resistance after quenching and tempering, and good low-temperature impact toughness. Therefore, it is more durable hard to damage, is a nice heavy and precise tool
- Function: Used to fix severely cross damaged spark plug hole thread, cleaned up the threads without leaving scraps in the bore, no need pull cylinder head, no need coil insert
8.2Good
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