Some people have an absolute knack for choosing the right terms to search for. I spent an hour looking at Farnell and couldn't find anything.
Looks like I don't have that knack, and thanks for your post, I am still none the wiser.
They are 100% 2 mm, measured with vernier calipers.
How are you “none the wiser”? I told you where I found some, and the exact name of the characteristic you’re looking for. You should be able to navigate to that site, get into the right category, and set the filters to include that property.
The key to finding this fast is to familiarize yourself with a vendor, then using their parametric search (filters) to find things. I recommend Digi-Key for this because they have the biggest selection but most importantly the best parametric search. Farnell probably does have a compatible part, but since their parametric search doesn’t include bottom entry capability, you can’t search for it.
So I’d use Digi-Key’s parametric search even if you plan on ordering elsewhere.
I’ve used Digi-Key’s site for a long time, so I am already familiar with how they’ve categorized connectors, so that helps me find stuff quickly.
Pitch: just double-checking because people often get the pitch wrong (e.g. by measuring the space between pins, rather than center-to-center).