"Yankee Hill Machine HUB 5/8""-24 Direct-Thread Mount"

Designed for .45-caliber bore sizes, the Yankee Hill Machine HUB 5/8-24 Direct-Thread Mount attaches to any HUB-compatible suppressor with 1.375-24 threads to allow direct threading onto any barrel with 5/8-24 threads. It's made from 17-4