Yankee Hill Machine Company Hub Direct Thread Mount Features The Yankee Hill Machine Hub Direct Thread Mount is machined from 17-4PH stainless steel and heat treated for strength then finished in black oxide for corrosion resistance and a low-glare appearance. The 1.375 inch dash 24 mounting threads are the standard HUB interface so the mount drops onto a HUB compatible suppressor in place of its existing mount mechanism. A .45 Caliber caliber bore keeps the mount usable across a wide range of pistol caliber suppressors built around that platform. Installation only requires removing the existing mount and threading this one on with a 3/4 inch open end wrench. Once installed the suppressor threads directly onto the host barrel s M24x1RH muzzle threads giving the shooter a direct thread option without retiring the HUB mounting system entirely. That flexibility means the same suppressor can switch between HUB and direct thread use depending on which host it is going onto. At just 1.7 ounces the mount adds negligible weight to the overall suppressor package. For suppressor owners who want to keep their mounting options open the Yankee Hill Machine Hub Direct Thread Mount is a compact purpose-built solution. Yankee Hill Machine Company Hub Direct Thread Mount Specifications Manufacturer: Yankee Hill Machine Company Model: Hub Direct Thread Mount Type: Suppressor Mount Color: Black Material: 17-4PH Heat Treated Steel Mounting Threads: 1.375-24 Thread Type: M24x1RH Bore: .45 Caliber Caliber Weight: 1.7 oz Caliber: .45 Caliber Available At: GrabAGun