I recently found some translated chapters of the Praecepta Militaria, by Nikephoros II Phokas. In the third chapter, "On the Kataphraktoi​" the author says:

"The kataphraktoi should have the following weapons: iron maces with all-iron heads – the heads must have sharp corners and be three-cornered, four-cornered, or six-cornered – or else other iron maces or sabers." [...] "All of them must have swords. They should hold their iron maces and sabers in their hands and have other iron maces either on their belts or saddles."

The translator suggest that these maces would be thrown during the charge to break up the ranks of defending infantry. Here is the full translation of that chapter (in the next post he talks about the throwing maces): https://forums.spacebattles.com/threads/spacebattles-reads-the-praecepta-militaria-by-nikephoros-ii-phokas-white-death-of-the-saracens.230390/#post-8299364

Is there any historical consensus of this matter? i've never heard of this before but it sounds fascinating! how widespread would this tactic be and in what in what time frame would these throwing maces be used? in particular would have they been used against the earlier sassanids and the later turks?