HMV attach horn to elbow ... how?

[SteveM]

I have a Hayes horn and a Dum Dum horn, both have big holes, about 1cm wide ... both came with big machine screws holding the horn to the elbow. I thought I'd splurge, and I bought two of those fancy brass "reproduction" screws from the Turkish seller on eBay (one of which is seen in the photos), thinking I would just screw them right into the big holes on my horns. Well, these screws have a shaft that is maybe 2mm wide, so I then realized my horns need to be modified in order to receive the new screws.

One of the big brass machine screws I have, which came with the horn, actually has a cavity inside it, and if I flip it around, the fancy new screw I purchased screws inside of it, somewhat (it's a bit too loose), as seen in the photos. Could that machine screw be original to the horn, and is that the proper part I need, or is it just a coincidence?

Any idea of what part I actually need here?

[jamiegramo]

Hi Steve,

I saw no one answered so I was going to do a picture this evening. However the part has appeared on eBay and shows you how it worked. I think Victor just had a locating stud on the horn? Sometimes the screw in thread is snapped-off so it works like the Victor stud.

Hope it helps,

Jamie

https://www.ebay.co.uk/itm/283885139852

[SteveM]

Thanks Jamie! That's exactly what I'm looking for. I had emailed that seller about my dilemma (the same one who sold the brass screws) but he seemed to have no idea what I was talking about, so I had quietly given up.