Head allen key screw

Listed on the following equipment:
Bremshey - Comp S
Bremshey - Fit S
Bremshey - OE Control
Bremshey - OE Orbit Trail
Bremshey - OE Pacer
Bremshey - Plus S
Bremshey - Pro S
Bremshey - RB Ambition
Bremshey - RB Cardio Comfort Trail
Bremshey - Trend S
Tunturi - C10 - PFC100
Tunturi - C20
Tunturi - T90 - PFT903

* Images may not be identical to part.