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E-Z Lok SK21015 Helical Threaded Insert Kit, 304 Stainless Steel, 3/8'-16 Thread Size, 0.563' Installed Length (Pack of 10)

4.3 (3) Write Review
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$48.43

$ 21 .99 $21.99

In Stock

About this item

  • QUICKLY REPAIR DAMAGED THREADS – Quickly repair damaged threads or reinforce tapped holes in soft metals with this helical thread repair kit.
  • STAINLESS STEEL WIRE – Kit includes stainless steel threaded inserts that are resistant to corrosion and can withstand temperatures to 800°F.
  • FOR USE WITH APPLICATIONS – The metal threaded inserts are designed for use with soft metals: aluminum, cast iron, magnesium, etc.
  • KIT INCLUDES – Convenient kit includes coil threaded inserts for metal, drill, STI tap, threaded insert installation tool, and tang break tools.


E-Z Lok manufactures threaded inserts for metal, plastic, and wood. The company is headquartered in Gardena, CA.


Brian A.
Reviewed in the United States on April 9, 2024
Easy to use, worked great for repairing threads in an aluminum transmission case. Only thing I wish was different would be the overall length of the threads...wish they were a bit longer in the new hole, but it still had plenty of thread engagement.
Charlie Stevens
Reviewed in the United States on June 6, 2023
Worked like expected and did the job.
John Mitts
Reviewed in the United States on May 29, 2023
I didnt dislike anything great product