====== Screws & Bolts ======
===== Material =====
  ? A4 steel
  : very low magnetic activity, chemically resistant, fairly costly
  : → preferred material for screws in the experiment
  ? Zinc plated mild steel
  : cheap, strong ferromagnetism, screws tend to stick exsessively in aluminium threading after a few weeks
  : → avoid close to atom experiments and in aluminium 
  ? Polyamid (PA)
  : electrical insulator, thermal insulator, mechanically weak - in particular smallish sizes (M4 and below), tends to give over time
  : → not recommended. Better solutions involve polymer washers and/or ceramics 

===== Torx (TX) =====
Key sizes [[https://www.fasteners.eu/de/standards/ISO/14583/|according to ISO 14583]]:
^ M2   ^ M2.5  ^ M3    ^ M4    ^ M5    ^ M6    ^ M8    ^ M10   ^
| TX6  | TX8   | TX10  | TX15  | TX25  | TX30  | TX45  | TX50  |

===== Crosspoint =====

==== Phillips (PH) ====

==== Pozidriv (PZ) ====