To fix a bookcase built by my dad who died last year, I am looking for the nylon or plastic connector that he used. They consist of a threaded dowel 3” by1/2” and threaded inserts 1”-wide insert for the 1/2”-threaded nut. They works really well making bookshelves with the inserts in the shelf boards and in the spindles. However, I have been unable to find anywhere.

Any suggestions? enter image description here


1 Answer 1


I would call those fluted dowel pins. I use a similar style of pre made dowels. Finding that exact model may take some time but give fluted dowel pins or rods and that should get you close.

  • Thanks for the reply, Ed. The pins are fluted, but the key is that they are also threaded. There are about 5 threads per inch. They screw into the matching threaded inserts. When I search for fluted dowel pins or rods, I just get the wood ones designed to hold glue.
    – Nealf
    Sep 7, 2020 at 18:40
  • Is it possible that he threaded them? I see what you are saying with the angled “threads” they may be OEM but try adding threaded to fluted or a variation of that measurement of the length and threads per inch or mm may be a standard pitch like 1/4-20 or 1/2-12 the diameter and how many Threads per inch. 5 per inch is not a common pitch I am aware of.
    – Ed Beal
    Sep 7, 2020 at 22:38

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