Hey everyone, After a few unsuccessful attempts of trying to find a broom handle tip (the threaded part that screws into the broom head) I gave up and figured out how to do threads in FreeCAD and made my own.
Here it is on thingiverse if you want it! I think this thread setup is used in alot of other things like push brooms, mops, extension rods for painting/cleaning etc.
If you find it useful, post a pic! I would love to see what else thing thingy will work with.
Right now I am working on a design adjustment that was brought up in the thingiverse comments section about adding a center hole for a bolt assembly to really strengthen the part. That should be done later tonight (printing it now).
Love it! Thanks very much!
Unless you need the head to be removable I would drill out the threads, push the shaft in the hole and then put a a screw through it.
@Mark_Rehorst I know what you mean. I’m my case the broom head is very light weight. This part might struggle more with a heavy paint roller is shop broom. I have swept my floors twice with it already. 0.1 mm height, 25% infill PLA at 185c and 50 mm/s. So far the part is holding well. I did print a reinforced version with an m4 bolt down the center to help as suggested by someone on the Thingiverse comments.
@Jules_Hoehn , since the structural weakness of the part comes from the bending and shear stresses that tend to separate the printed layers, perhaps it might be stronger if printed using 0.3mm layers (thus it has less layers to separate) and with a greater infill percentage, instead of 0.1mm layers and 25% infill.
@Paul_Gross possible, I was thinking that hotter thiner slower layers would give PLA better layer adhesion. I kinda wished I had the equipment to test the parts sheerability.
@Mark_Rehorst my thoughts exactly, the part is built and ready to print. If my broom breaks in another few months, I have another reason to fire up my printer 
and I would only be out about 5 cents in plastic.
I think my petg will be much stronger of a part, but I’ll try that if this PLA part fails.