stubby antenna mast

[Burdar]

Does anyone run a short antenna?  I don't like the long factory ones.  I'm looking at a few different styles online but they all are threaded for metric fasteners.  It looks like the original thread was 1/4-20 and the new ones I'm seeing are 5mm.  A google search said you can't drill and tap a 5mm threaded hole for 1/4-20 threads.  The adapters that come with the antenna are all variations of metric thread.  I haven't seen any adapters that convert 5mm to 1/4-20.

[Bullitt-]

Would these tri pod adapters do the trick?
1/4" Male Threaded to M5 Male Threaded screw Adapter

https://www.amazon.com/ECSiNG-Adapter-Converter-Accessories-Monopod/dp/B0CCRPDXGP/ref=sr_1_3?

https://www.ebay.com/itm/146053745518?

[Burdar]

They might.  Thanks for that link.  I'll have to look at the antenna base on the car and see how far down the threads start from the top.  I think the threads start down lower in the hole and the 1/4-20 section of those adapters is really short.  I might be able to machine off the middle section so it would screw in farther.