E-Z Lok 400-4 Threaded Insert, Brass, Knife Thread, 1/4"-20 Internal Threads, 0.500" Length (Pack of 25)

Este producto se usó para reparar las patas de una silla. Los insertos originales se dañaron y los reemplazos que llegaron fueron la solución perfecta, inclusive mejores que los originales.

Worked great, but add some wax on the thread to make it go in easier in hardwood

LLegó muy rápido y el threaded insert es de buena calidad, recomendado!

This review is for 1/4-20 brass inserts.First off, I got some really good tips from other reviewers and hats off to them! I will give a more detailed review to help other folks install these as it is tough to install in hardwoods straight. Here is my pictorial review based on a live edge bar project:Photo 1: As with any thread, there is a lead angle which allows the insert to sit at a slight angle when sitting in the hole.Photo 2: Using the E-Z LOK installation tool, I installed the insert but went in at a slight angle equal to the thread lead angle (Not good!). See the remaining photos for alternate installation methods.Photo 3: I cut the head off a 3" 1/4-20 bolt and threaded two nuts on the end and jammed together. In red oak, I first drilled 25/64 holes for the inserts in my drill press. This was the drill size listed with the inserts. I tried a slightly larger drill bit, 13/32", which allowed the insert to go in easier but the insert tended to pull out slightly when tightening down the 1/4" fastener. I would stick with the manufacturer's recommendation on the bag (Using the methods in this review, you will have no issues installing). I then chucked the tool I made in my drill press.Photos 4 and 5: For work you can fit in a vice, it is better to use a drill press if available (If not see photos 6, 7 and 8). While applying a downward force with the drill press handle, turn the upper nut using a 7/16" ratchet wrench. When the bottom nut is flush with the work, un-chuck the inert tool and remove it from the insert using the bottom nut. (Note: use soap or thread wax on the insert threads. It will go in much easier. Also go slow and never turn on the drill press to install !).Photo 6: The live edge bar top was too large to fit on the drill press. The top was from a large cherry branch. I used a drill guide to drill the holes. You can get a drill guide on Amazon for about 30 bucks. I would get one anyhow since you can use it for many other projects. They also have a nice depth stop to keep from drilling through the board.Photos 7 and 8: I installed the inserts in the bar top using the drill guide. I chucked the tool I made for the drill press into the guide chuck. I got a 3/8" chuck with a 1/4" hex shaft on Amazon to chuck to the guide top shaft. Then I used a 1/4 drive 1/4" socket with a 6" extension and T handle to fit onto the top chuck hex shaft. Then installed the insert while applying a downward force on the T handle. The tool can be removed by just turning back the T handle. The inserts went in perfectly straight using the drill press or drill guide! (They go in easy with the drill press but also go in without much difficulty using the drill guide).Photos 9 and 10: This is the finished bar project. The bar legs were made from 1" black pipe and fittings all attached to the top, foot rest and feet using the brass inserts.Installing the inserts with the E-Z LOK installation tool is difficult in hardwood, but I am still giving them a "5" since they are such a quality product. I made all the pieces in my garage then assembled easily in the basement due to the inserts and can be easily disassembled if necessary.The only thing I would change with the insert is to have a slightly longer unthreaded nose to help overcome the thread lead angle.FYI, in order to remove an insert, you have to use the E-Z LOK installation tool. A screw driver will just bugger up the slot (So even with the above installation methods without the tool, I would still purchase one to remove an insert if necessary).Oh, also use a scrap board to practice a couple of installations to get the hang of it.

These did not break apart when you threading them in, I expected some of them to but none did, I was even able to remove them and reuse them after a slight layout mistake. I was using them in HTPE board to make a folding table for my sailboat and they are standing up well in the marine environment as well. Overall great product.