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Helicoil 5546-8 M8 x 1.25 Metric Coarse Thread Repair Kit

4.7 out of 5 stars 88 customer reviews
| 11 answered questions

Was: $31.45
Price: $29.44 & FREE Shipping on orders over $49. Details
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  • The product is 8x1.25Thread Repair Kit
  • Easy and simple use kit
  • The product is manufactured in China
  • Includes 12 inserts, complete instructions, Heli-Coil tap and installation tool
  • Used for repairing tapped holes
  • Made from high quality material
  • Comes in a carded package
  • Easy to use
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$29.44 & FREE Shipping on orders over $49. Details In Stock. Ships from and sold by Amazon.com.

Frequently Bought Together

  • Helicoil 5546-8 M8 x 1.25 Metric Coarse Thread Repair Kit
  • +
  • Bosch CO2148 21/64-Inch Cobalt SP Jobber Drill Bit
Total price: $37.14
Buy the selected items together


Product Information

Technical Details

Brand Heli-Coil
Item Weight 0.2 ounces
Product Dimensions 5.6 x 0.5 x 3.6 inches
Item model number 5546-8
Manufacturer Part Number 55468
OEM Part Number 5546-8
National Stock Number 5325-01-554-7009

Additional Information

ASIN B0002SREP4
Customer Reviews
4.7 out of 5 stars 88 customer reviews

4.7 out of 5 stars
Best Sellers Rank #9,628 in Automotive (See top 100)
#5 in Automotive > Tools & Equipment > Thread Repair Kits > Metric Inserts & Kits
Shipping Weight 0.2 ounces (View shipping rates and policies)
Domestic Shipping This item is also available for shipping to select countries outside the U.S.
International Shipping This item is not eligible for international shipping. Learn More
Date First Available July 7, 2004

Warranty & Support

Warranty, Parts:Parts
Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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Product Description

8 x 1.25 Metric, Thread Repair Kit, Includes 12 Stainless Steel Inserts, Hel-Coil Tap, & Installation Tool, In A Resealable Blister Card.

Customer Questions & Answers

Customer Reviews

Top Customer Reviews

Verified Purchase
I purchase this beacuase a Mechanic stripped the caliper bolt hole on my 1999 Jeep Cherokee Sport. He then told me I needed a a whole new spindle because of the stripped bolt whole which would cost hundreds on dollars in parts and labor. I want to tell anyone who needs to repair a stripped bolt hole that this product work great. I completed the job in under a hour, start to finish. Just keep in mind that in order to use this product I also had to purchase a 21/64 th drill bit to drill out the hole before repairing the threads for the helicoil to go into. You might also want to purchase a T handle designed to hold the the tap straight while making the new threads. Again this is a fast and easy way to repair threads and it will save you a small fortune in stead of paying a machanic a lot of money to do a 45 minute job.
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Verified Purchase
I have to admit that I was nervous about installing this product. I needed to replace the threads for two cylinder studs on an engine. I was worried about drilling the hole a little cockeyed and then the studs wouldn't line up. If I screwed it up I didn't have a "plan B". With all of my apprehension the first one took @ 45 minutes. After doing the first one, the second took about 10 minutes. It's much simpler than I had imagined it. Follow the directions and it works smoothly. One point though. When drilling the hole for the helicoil you need to make sure to take into account the taper on the drill bit tip. When screwing in the helicoil it will stop when it hits the taper. Make sure the hole is deep enough with the full diameter of the drill bit for the insert to go all the way in. It's really a very simple process that does an excellent job.
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Verified Purchase
These things are life savers. But on this M8, they didn't notch the ends deep enough, so they are harder to break off. Took me quite sometime to get them off on 2 separate jobs. I've used M6 before, and the ends were a snap to break off.
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Verified Purchase
My truck's thermostat housings threaded holes were messed up by the previous owner causing it to leak. This was a lifesaver! Never used a helicoil before but it was fairly straight forward and worked like a charm. Make sure to buy the 21/64th drill bit for this kit also.
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Verified Purchase
Thanks to Chrysler and cutting corners with the metal used on thier spindles, the caliper mounting holes stripped with very little effort This helicoil kit covers most Chrysler applications. It saved me from a trip to tbe junkyard, in search of another spindle. It worked like a charm. Make sure to have a sharp drill bit and used plenty of cutting fluid. Same goes for the tap. Work it a turn or two at time, then back it out using carb cleaner or compressed air to clean the metal shaving out. The tap seems to fairly sharp after 2 holes. I'm not sure if the inserts hold once I do the brakes again, but I have 8 more left. Thanks again Chrysler!

1 Drill
2 Tap
3 Insert
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Verified Purchase
Works great for those pesky exhaust manifold bolts on a 1992 Plymouth Laser. During my engine rebuild I managed to strip a couple of bolts that go into the aluminum head (think I need a new torque wrench!) and this pack worked perfectly for creating new threads that have held up great so far.
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Verified Purchase
Now this was just what the doctor ordered. I had a problem with a welded nut that held a "T" bolt. Took my tap and die set out to FIX it and actually made the hole/threads too big for that "T" bolt. Had heard about Helicoil but never used one. Sent for this and it works just exactly as you might think. Retap the bad hole with the supplied tap and then screw the new threads into the hole and you now back to the original product. That very same "T" bold worked as though nothing had happened. Very happy.
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Verified Purchase
I had a problem with the caliper on my jeep TJ. Im the wife of a mechanic who is deployed currently, and my spouse said to repair it with a Helicoil. I ordered the correct part (after researching some jeep forums), as I am not a pro, I called a mobile mechanic to come and show me how to install these nifty little devices. After a Tutoring lesson, which I was surprised how quick and easy the repair was (everything I needed but a drill bit was included in the set), I am positive I could tackle the next one (if I ever have to) alone. Thank you for having everything needed!
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