Digital Microscope Extension Arm Screw Knob

This is an additional part to the awesome extension arm made by battman450 for the Digital Microscope. Link below,
Extension arm - https://www.thingiverse.com/thing:2344391
Digital Microscope - https://www.banggood.com/Mustool-G600-Digital-Portable-1-600X-3_6MP-Microscope-Continuous-Magnifier-with-4_3inch-HD-OLED-Display-p-1119592.html?p=DG23031123036201501P

Additional parts you need,
1. 45mm long hexagon screw. 5mm shaft. Hexagon head is 8mm diameter or size 8'
2. Nut or lock nut for 5mm screw
3. the CAP file is optional

As there's no teeth for the arm to grip anymore, this screw knob comes handy whenever I need to tighten the arm position.

This is a great microscope with very impressive magnification and the extension arm made it even better!

Drawn by me and created in 3D by my good friend Jiayi Yat.