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helicoil 5521-4: 1/4-20 inch coarse thread repair kit - fixes threads with precision logo

Helicoil 5521-4: 1/4-20 Inch Coarse Thread Repair Kit - Fixes Threads with Precision Review

3

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Very good

Revainrating 4.5 out of 5  
Rating 
4.3
🪛 Thread Repair Kits, 🔧 Automotive Tools & Equipment

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Description of Helicoil 5521-4: 1/4-20 Inch Coarse Thread Repair Kit - Fixes Threads with Precision

The product is 1/4-20thread 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 carded packing. Easy to use. Includes 12 inserts, complete instructions, Heli-Coil tap and installation tool. Used for repairing tapped holes. Made from high quality material. Comes in carded packing. Easy to use.

Reviews

Global ratings 3
  • 5
    2
  • 4
    0
  • 3
    1
  • 2
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  • 1
    0

Type of review

Revainrating 5 out of 5

Repairing my lawnmower's muffler bolt holes

Purchased to repair the muffler boltholes on my 5.5hp Briggs and Stratton lawnmower engine. This is my first time using a helicoil kit and it was very easy. I've mowed a few times since the patch and it's holding up great. Glad I found this instead of tying up my mower at the store for who knows how much money. Took about 30 minutes to fix 2 bolt holes on the mower, no need to pull the motor, access to the mower deck was a huge time saver. As a second measure, I used Loctite red high temp high…

Pros
  • To repair threaded holes
Cons
  • Obsolete model

Revainrating 5 out of 5

An easy way to fix a broken thread.

You can't go wrong with HeilCoil for replacing stripped threads. If you care about the weather, you need the HeliCoil faucet in this kit. Yes! You have to buy a special faucet from them. This is a very unique thread size for HeliCoil. A standard drill bit size is used for drilling. For this kit 17/64 bit. It is recommended to use some Loctite or thread sealant when inserting the HeilCoil. I got this to fix a blown muffler bolt hole on my lawnmower's exhaust manifold. I had to use it on my grill

Pros
  • Easy to use kit
Cons
  • Requires socket

Revainrating 3 out of 5

Light! Is working!

Five Passes for Simplicity and Results I stripped a clamp thread in the stern of a small boat, hard to tell what it was until I did an "operation". I found it to be about 3/8 inch thick, probably steel, and worth threading, so I bit the bullet. First tries to weld JB to do the carving: *bzzzt* FAILNext stop, Helicoil. Truth. Drill fast. Threading it was a bit risky, I've NEVER threaded thread before, and it was hard to twist at first, then very easy, like it was torn off (instead of being)…

Pros
  • Easy to Use
Cons
  • Ugly Packaging