Whicht bolts I need to connect throats?

[Altec Best]

I got them from my local Homey-D crap shack ! In plain terms Home Depot...

On my Tar-Filled 1005's Earl the flange on the Horn is threaded so the threads have to be right.I measured with a tape measure and hand counted the threads 3 times for accuracy.There are 24 turns per inch.They are just bolts/washers no nuts needed.The throat mounts to the horn just by the threads in the horn.

If you need some photos Mike I can snap a couple for ya ?