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E-Z LOK - 319-5 E-Z Lok Externally Threaded Insert, C12L14 Carbon Steel, Meets AISI 12L14, 5/16'-18 Internal Threads, 7/16'-14 External Threads, 0.437' Length, Made in US (Pack of 10)

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$20.40

$ 8 .99 $8.99

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1.NumberofItems:10


About this item

  • THREADED INSERTS FOR METAL – E-Z LOK Thread Inserts for metal. Solid threaded inserts that are strong, easy to install, and self-locking. For optimal holding power in metal.
  • INSTALL WITH STANDARD TOOLS – 12L14 Carbon steel threaded inserts. Install with standard tools. No special drills, taps, or special installation tools are needed.
  • QUICKLY REPAIR DAMAGED THREADS – Quickly repair damaged threads or reinforce tapped holes in soft metals with these steel thread inserts.
  • FOR USE WITH APPLICATIONS – The threaded inserts are designed for use with soft metals: aluminum, cast iron, magnesium, etc.
  • STRONG THREADS MADE EASY – Simply drill the hole with a standard drill. Tap the hole with a standard tap. Turn in the insert with a screwdriver, bolt/jam nut, or an E-Z LOK drive tool.
  • IMPORTANT NOTE: Installation requires the use of a Letter X drill.


E-Z LOK threaded inserts for metal provide an easy to use solution for repairing or reinforcing threaded holes in metal. Ideal for use in metals like aluminum and cast iron, E-Z LOK threaded inserts are screw machined out of solid steel for greater strength and superior pull out resistance. Standard external threads permit the use of standard drills and taps for installation. Once the hole is prepared, E-Z LOKs are threaded into the hole like an ordinary fastener using a screwdriver, bolt and jam nut, or optional E-Z LOK drive tool. E-Z LOKs are self locking and will not back out or vibrate loose. A preapplied adhesive activates upon installation and bonds to virtually all metals. Fastener-ready in minutes, the adhesive seals against liquids and gases to pressures of 6,000 psi. when fully cured (72 hours).


Billbo72
2025-08-26 16:28:32
Exactly what is advertised. Work great.
Zak
2025-08-19 18:33:04
These are basically a lower cost clone of the oversized Timesert thread repair inserts (the "second chance" version for holes that have already had a repair fail). The big difference is that the outside thread on these uses a standard 7/16" tap, whereas the Timesert uses a proprietary tap with a weird thread pitch. The cost of the Timesert kit would have been more than the cost of replacement engine block in my case, but these things saved the day!
Jake
2025-08-13 15:46:06
This little device saved me. I broke a tap off Ina cylinder head bolt. After I drilled it out it was too large for a standard bolt. You simply drill the hole to the intended size for the insert, tap the hole, and screw the Insert in. You can use a flathead screwdriver although I opted to purchase the special insert tool. The head torqed down with no slippage and my tractor is running great. The red stuff in the threads is thread locker. It keeps the insert securely installed.
Benjamin L.
2025-06-27 11:21:34
Fixed my carburetor stud accident (dont ask). Bored the damaged hole out with a 3/8 bit then used a 7/16-14 tap and it screwed in perfect. Was able to save my new intake and avoid a huge problem!!
ron hax
2025-05-28 16:19:47
Great for thread repair in soft materials such as aluminum. Fair price, quick shipping. Can save a damaged product.
Chris Sheffield
2025-05-12 15:06:28
Had to use in an open water jacket head stud on a dodge. Built me a simple installation tool. I put sealant on insert side and loctite on the outside end. They beat helicoils hands down.
Tommy
2025-04-19 13:55:08
Got me out of a bind. Used it to replace a bolt broken off on my Water pump. Worked fine.
Me
2025-03-24 11:02:23
Worked perfectly for my application. Tapped the engine block and bolted it in place.
Customer
2025-02-06 14:31:36
thread repair in aluminum
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