Elliott Sound Products PCB Pins 

It seems that these are not readily available, so now they are. They come in a pack of 50 (feel free to count them in the picture below :-), and are suitable for the 1mm holes used in all ESP boards for just this purpose.

Note: The pins are only available with a PCB purchase - they are not sold separately

Order CodePINS
Size (mm)1(dia) x 12 (long)