Pressure Fit Brass Threaded Inserts 3/8 inch by 16 tpi Internal Threads with Opposing Angle Outside Grooves Ideal for Wood Turners Contractors Furniture Building and General Home Use Pack of 10

very happy item as expected

Works as described

Used for making bottle stoppers. Drilled a 12.5mm hole. Worked very well. Put on a drop of medium CA glue before pressing it in.

This brass insert has a 3/8- 16 inside thread. You need to drill a 1/2" hole in your material and press it in. Bought this insert to work with my BM WOOD bottle stopper chuck. Put the small side in the hole and press in with a clamp or vice.

I ordered "Classic Chrome Style Bottle Stopper with 3/8” x 16 tpi Threaded Post For Attaching Hand Made or Lathe Turned Handles … (10 Chrome Stoppers)," and Amazon recommended "1" x 8 tpi Bottle Stopper Chuck with Pilot Hole Drill Bit. Designed To Mount A Bottle Stopper Blank To Your Lathe Without Using A Jaw Chuck. For use with 3/8” x 16tpi Bottle Stoppers" and this item, "Pressure Fit Brass Threaded Inserts 3/8 inch by 16 tpi Internal Threads with Opposing Angle Outside Grooves Ideal For Wood turners Contractors Furniture Building and General Home Use Pack of 10" The problem is that the brass inserts will not thread onto the bottle stopper chuck.