https://www.crazycrow.com/powder-horns/brass-horn-plugs-with-bushings-large
Brass Horn Plugs With Bushings - Large
4940-000-011$17.95
Product Details
If you want a fancy brass base finial for your powder horn, these solid brass, turned fittings are just the thing. Threaded for easy refilling of your horn, they're easy to install by simply drilling for the included bushing and gluing it in place.