RE: Cap Head screws for Hitec?
They are 2.6mm x 8mm you can get them at McMaster Carr or anyone who carries smaller metric hardware. The LHS only carries 2.5mm x 8mm (figures)
I use 2.5mm x 8mm cap screws with no issues... I use blue loctite on the threads and they never come out in flight, but will come out when needed without stripping the phillips head / shearing like the stock screws...
Been using these for years on all my Hitec MGs..
DP