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by E-Z LOK

E-Z Lok Threaded Insert

Available in multiple versions

4.3 out of 5 stars 213 customer reviews

Price: $2.00 - $16.30
Product Specifications
Brand Name E-Z LOK
UNSPSC Code 23291804

E-Z LOK Knife Thread inserts for hard wood significantly reduce the possibility of stripping when... See more product details


Currently showing 1-18 of 18
Size Overall Length Part Number
The Amazon Standard Item Number (ASIN) uniquely identifies the item in the Amazon catalog.
Price Quantity
   
Knife Thread, #10" 0.500 inches B002KSZ0GE
$7.25
Knife Thread, #10" 0.500 inches B002KT11CA
$5.25
Knife Thread, #10" 0.500 inches B002WC8TS4
$16.10
Knife Thread, #6" 0.375 inches B0026GUEN4
$8.64
Knife Thread, #8" 0.375 inches B002WC8TPW
$6.84
Knife Thread, #8" 0.375 inches B002WC8TRU
$13.80
Knife Thread, 1/4"" 0.500 inches B00207NF6W
$7.25
Knife Thread, 1/4"" 0.500 inches B002WC8TQ6
$11.89
Knife Thread, 1/4"-20 Internal Threads, 0.625" 0.625 inches B002WC8TSE
$16.30
Knife Thread, 3/8"" 0.625 inches B0026GZU0Q
$5.20
Knife Thread, 3/8"" 0.625 inches B002WC8TQG
$3.40
Knife Thread, 5/16"" 0.625 inches B0025PLFU2
$4.20
Knife Thread, 5/16"" 0.625 inches B0026GUEOS
$4.20
Knife Thread, M3" 9.52 millimeters B0026GSYE0
$2.00
Knife Thread, M4" 9.52 millimeters B002WC8TQQ
$2.00
Knife Thread, M5" 12.70 millimeters B002WC8TR0
$4.53
Knife Thread, M6" 12.70 millimeters B002WC8TRA
$4.93
Knife Thread, M8" 15.88 millimeters B002WC8TRK
$4.70
Currently showing 1-18 of 18
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Product Features

  • Provides a Strong Machine Thread In Hard Woods
  • Ideal For Use in Woods Like Oak, Cherry, and Maple
  • Designed For Use In Furniture, Cabinetry, Storm Windows and Marine Applications
  • Simply Drill the Appropriately Sized Hole and Install with Screwdriver or Optional Drive Tool
  • Proprietary External Knife Threads Provide Superior Holding Power

Product Details

  • Shipping Information: View shipping rates and policies
  • Domestic Shipping: Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B015QV3982
  • Average Customer Review: 4.3 out of 5 stars  See all reviews (213 customer reviews)
  • Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

Product Description

E-Z LOK Knife Thread inserts for hard wood significantly reduce the possibility of stripping when using a threaded fasteners in materials such as oak, cherry, and maple. Ideal for applications ranging from furniture to cabinetry to storm shutters, E-Z LOK Knife Threads are easily installed using a standard screwdriver or optional drive tool. Simply drill the appropriately sized hole and thread in the insert like an ordinary fastener. Proprietary external Knife Threads slice into hard wood, providing holding power superior to that of typical broad threads which crush wood during installation.

Customer Reviews

Top Customer Reviews

Size: Knife Thread, #6"Overall Length: 0.375 Verified Purchase
I've been using various sizes of these inserts for some time in hardwood projects. They work great. I do have a few tips, though:

1. Drill the hole slightly oversized for hardwood. I use a 9/32" bit when 1/4" is specified. I find that the threads will tear out a lot of wood if you try to force them into a smaller hole and you may damage the insert. Apply a bit of wood glue to the outside threads as both a lubricant and to lock them in place.

2. Do not try to screw these into place with a flat bladed screwdriver. It's frustrating and very likely to break the insert. Save the slot on the insert for if/when you have to remove the insert. To drive them, you can buy a tool, but I use a bolt of the right size, with a Phillips, hex or square drive (too hard to "steer" a slotted bolt). Thread a nut on the bolt so enough thread is exposed below the nut to go about 1/2 - 2/3 the way into the insert. Finger-tighten the insert against the nut and drive it in using the bolt. When it is seated, twist the driver backward sharply and the bolt should back out leaving the insert behind (otherwise, use a pair of pliers to loosen the nut).
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Size: Knife Thread, 1/4""Overall Length: 0.500 Verified Purchase
These seem to be well made and work well, but here are a few thoughts after having installed them:

- First and foremost, install one on a piece of scrap lumber before trying to install them in your project to avoid unpleasant surprises.

- I agree with those who suggest larger pilot holes. I had 1/4-20 inserts, for which the recommended hole size is 3/8". I was installing these in pine, which is a soft wood, but still found I got better results with a 13/32" hole (1/32" larger than recommended. When I tried one with a 3/8" hole the surface of the wood raised up a bit around the hole. At he very least I would drill out the pilot hole near the surface to avoid this problem. In harder woods I'd probably use an even larger hole.

- Having never used these before, I naively assumed they'd follow the holes I drilled for them, and as a result go in perpendicular to the wood's surface. Wrong. At least in pine they will go in at an angle if you aren't very careful unless you use some kind of jig to ensure they go in straight. I inserted a couple by hand and it was a pain to get them straight, so I made a simple jig to install them out of a short piece of 2x4, a 1/4" bolt and nut.

Using a drill press I drilled a 3/4" hole about halfway through the 2x4 and then drilled a 1/4" hole the rest of the way through. I inserted the bolt in the 1/4" hole and screwed a nut on the end until it was about half-an-inch past the end of the bolt.

To use it I screw an insert onto the bolt and finger-tighten it against the nut, and then push the insert back up into the recess until it's almost flush with the surface of the 2x4.
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1 Comment 45 of 46 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Size: Knife Thread, 3/8""Overall Length: 0.625 Verified Purchase
I used these threaded inserts for making my own beer tap handles for a kegerator; they fit the Perlick faucets perfectly.

The inserts are made of brass and have pre-cut "top" that can be used to screw the insert into whatever you are putting it in. The screwdriver diameter is a 1/2 inch, which is probably a bigger size than one would normally have in their toolbox. I purchased the E-Z LOK Drive Tool - Optional - Use with 329-6, 329-601, 329-624, 303-6, 303-624, 319-6, 319-624, 335-6, 450-10, 550-6, 650-10, 650-10F, 453-10, 653-10, 653-10F, 400-6, 400-624,, which worked like a charm (placed the bit in a vice, placed the threaded insert on top of that and then placed the tap handle on top of that and screwed it down onto the thread).

They recommend a half inch drill hole, which is pretty tight depending on the wood you're using (though going up a drill bit size would probably be too wide). You may need to sand your hole a bit wider to make the it a bit easier to get it started. Also, you may consider putting some wax, etc. on the threads before screwing in to help lubricate it.
4 Comments 27 of 28 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Size: Knife Thread, 1/4""Overall Length: 0.500 Verified Purchase
This is an excellent product for soft to medium density wood.

DO NOT use for Hardwoods. Use the stainless steel type. E-Z LOK Threaded Insert For Hard Wood; 1/4-20 Int Thread; 303 Stainless Steel (Pack of 10)

It is a well made product that works extremely well, however the heading states:
"E-Z LOK Threaded Insert For Hard Wood".

I could easily rate this a 5 star if it stated it was for soft to medium density woods.

Suggest the following;
26/64" (13/32") pilot drill in Hard Wood such as oak or maple.
25/64" pilot drill in Medium Density such as Poplar or Ash.
3/8" pilot drill in soft to medium density woods such as pine.
4 Comments 37 of 40 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Size: Knife Thread, 1/4""Overall Length: 0.500 Verified Purchase
I've been using smaller versions of these threaded inserts for some time but decided I needed something larger for a recent project. These filled the bill and the price here is good - usually you find them in packages of 4 or 8. One warning, if you are putting these into hardwood you probably want to drill the hole one size (1/64 - 1/32) larger. I find they often tear out wood if you drill the hole with the recommended size drill. Experiment on some scrap before you decide.

Trying to drive them with the slot on top is a waste of time. It's very likely to tear out or even break. (And then you're hosed if you have to back the insert out of the wood at some point.) You can buy the dedicated driver tool but I just use a bolt of the right size with a nut threaded down so it can be threaded about 1/2 to 2/3s of the way into the insert. Use a bolt with a philips, hex or square drive (a slotted bolt will slide around) and screw the insert into the wood. Then you can usually back it out with a sharp reverse twist or, worst case, hold the bolt with the screwdriver and loosen the nut with a pair of pliers or a wrench. (Bonus: the nut will slightly dimple the wood making sure the top of the insert is below the surface level.) Applying glue to the threads isn't bad insurance, or apply a drop of superglue after the insert is set. One thing I use them for is creating threaded holes in MDF jigs, gluing them in. They're easy to salvage if the jig wears out or is no longer needed.
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