Is it the same diameter as the carabiner sold as part of the HH package?
I think that's part of the overall engineering is how that particular carabiner works with the size of the slots in the HH body.
Whew, any screw pin on which my life is dangling sure as shooting would be hard wired shut.
If you are selling this as a replacement for the engineered and tested HH package, you better be sure nothing's going to go wrong otherwise you may be liable...you doing your own replacement, that's your risk, selling it...I dunno, Just sayin'