So perhaps ESQ-108-39-(LGT)-S
for single row of 8 pins, standard size receptacle, and the longest 0.025" square leads available.
LGT is the plating finish - see the drawing.
Check the drawing to see if that's long enough for you.
Thanks. It looks like they also have sockets where the plastic body (part above the board) is a bit longer than what's on the Uno Rev3. Maybe the next hardware rev shoud use a taller block. This issue has caused me trouble a couple times now, once with a
protoboard shield that hits the usb jack and so ended up having a flaky power connection, and again when I want to use ISP with
shields on. I don't think saving 2.5 or 4mm of height on the stack is worth the trouble myself, for a prototyping system in particular
the extra space between layers is more valuable.