hi,
the tap is 3,00 x 0,30 mm for the 702 tube
I made a few tubes (700 and 702 ) in 2009 when there was no source for generic parts.
same tap size for both.
here you go:
https://www.beco-technic.com/uhrenersatzteile/federstege/rlx-sonderform-federstege/federstege-rohr-laenge-20-00-mm-o-2-00-mm-zapfen-laenge-2-80-mm-o-1-20-mm.html
please use glossy paint for both pad printing ink and dial varnish (like gen. sub 300 dial)
for the orange dial.
black varnish is matte with glossy print.