Spain has been an actual fascist state, so historically this is unrelated, but you may find it interesting to know that it's also present quite prominently at the US Congress[0] as well as in the US Senate's seal[1].

[0] http://www.bibliotecapleyades.net/imagenes_sociopol/icke110_...

[1] https://en.wikipedia.org/wiki/Seal_of_the_United_States_Sena...

That is not the Spanish coat of arms, it is the Guardia Civil coat

https://en.wikipedia.org/wiki/Civil_Guard_(Spain)

The Coat of Arms of Spain doesn't have fasces.

https://en.wikipedia.org/wiki/Coat_of_arms_of_Spain