Press Insert, Insert Type Knurled Press Insert, System of Measurement Inch, Overall Length 3/16 in, Insert Diameter 11/64 in, Thread Size #4-40, Thread Direction Right Hand, Thread Type Coarse, Material Stainless Steel, Material Grade/Class 18-8, Finish Plain, Flange Style Flush, Body Texture Knurled, Number of Fins Not Applicable, Compatible Material Plastic, Drill Bit Size 5/32 in, Minimum Material Thickness 1/4 in, Maximum Hole Diameter 0.156 in, Manufacturer Location Made in USA.
These are really nice inserts!
I needed 4 of these inserts to allow me to attach a lazy-susan swivel mount to a drum thrown so I could swivel the seat without it squeaking and screeching! To (always!) avoid using a standard flat head screw driver I used a 1/4-20 hex cap screw and an Allen wrench to insert these into the pre-drilled holes: worked great. Don't forget to use some wood glue on the threads, too. Now, no more irritating "screech!" when I play the Tom Toms!
The internal thread 1/4-20 are great from E-Z LOK threaded inserts for wood are offered in designs for hard and soft wood. Knife thread locking inserts provide a strong, machine thread in hard woods like oak, cherry, and maple. Zinc die cast hex drive inserts offer a cost effective solution for soft woods like pine, composition board, and MDF
I thought I could install these in really old really hard wood with a humongous screwdriver. No matter how hard I tried, I didn't quite get them straight. The ones that were close required a humongous amount of force at the very end & the ones that weren't quite close ended up in the trash. Fortunately I only needed six & destroyed 3, so I have one left over.
Once installed, they work great. Buy the installation tool; cheap for the better installation & avoided frustration.
I purchased the kit as well which includes the specific size drill and the installation tool. While the drill size is okay, I found that when installed in harder wood types such as Red Oak, it is better to use a slightly larger size drill for the insert location. This reduces the strain applied to the installation lugs and avoids shearing the lugs when installed.
This product was excellent. Got it fast and was as advertised. A great product, but there was nothing there to indicate what size hole to drill to use it. Not hard to figure out, but it was a bit inconvenient.