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.

[Dakota]

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.

I have a stock antennae mast that wants a new home if you end up needing one. 

[Mr Lee]

I have one... but I'm sorry... couldn't tell you where I got it.  It was one of those things that I just had laying around in a box of parts that I didn't even know I had.  Probably came off of a parts car maybe?  I dunno.  Did Challengers come with these shorties, and if so, why?  It'll barely get you one or two radio stations but I don't really listen to the radio much in my Challenger.  I like the fact that the car cover goes over it.   

[Mr Lee]

What cars did the shortie antennas come on?  Now I'm even more curious where I got this thing  lol

[Bullitt-]

here's one that comes with the 1/4-20 adapter, they seem to make it in 4" & 8"
http://www.metraonline.com/part/44-RMCF

This appears to be the same product .... My local Autozone shows them in stock
https://www.autozone.com/electrical-and-lighting/antenna/p/metra-electronics-carbon-fiber-4in-antenna-mast/220433_0_0?spps.s=31
8-inch
https://www.autozone.com/electrical-and-lighting/antenna-mast/p/metra-electronics-antenna/220466_0_0

similar part with adapter
https://www.supershops.com/products/audio_mobile_electronics/antennas_and_accessories/parts/MET44-RMSR