https://drive.google.com/open?id=1JcuNYck3quuLx15dqdAfM_iOOK4M8ck0
Is this commercial screw legal? It is m4 screw less than 2 inch.
You should be fine I’m pretty sure you can use any nut bolt rubber band zipties are legal
Only if they are of identical size to the associated VEX products. #32 and #64 rubber bands. 4 inch and 11 inch zip-ties. For bolts, 6-32 or 8-32 are legal. I don’t know whether Metric bolt sizes are acceptable or not.
An unofficial answer: it looks legal to me.
<R7> c. “Any commercially available #4, #6, #8, M2, M2.5, M3 or M4 screw up to 2” long, and any commercially available nut and/or washer to fit these screws."