Yeah it gets pretty complex with all the choices available. The part number for PCIe connector I use is 45559-0002, you can see it on the Heilind link
If you scroll way down that page there are the female pin terminals that go inside of it. They have many options as well, such as gold plating, etc. The cheapest option there looks like part # 39-00-0077 which is tin over copper plated brass.
Edit: After rereading your post, maybe you are asking what part plugs into the PSU itself? That tends to be proprietary by manufacturer of the PSU. Most of the people that I’ve seen making their own cables use server PSUs and choose their terminals based on what fits the blades or they direct solder.
Published at Mon, 20 Feb 2017 23:05:41 +0000