M4x16 bolt for the umbrella.
M6x30 bolt and M6 nut for the hinge
1 or 2 M5x20 bolts and M5 nuts for the light stand spigot clamping.
Use hex-headed bolts if you want to attach a 3d printed thumb-wheel. (There are serveral designs out there.)
Otherwise a Phillips #1 head (cross) or allen key works well.
I'm trying to design things that serve a practical purpose.Mostly film making gear and parts for CNC machines.For my designs I try to also publish* the original file (usually Alibre/Geomagic)* technical drawings with dimensionsy...