Will a filtered 250V IEC socket still work given 110V?
If you look into the spec sheet of your link, there are ratings for both 50 and 60 Hz:

Ratings IEC 1 - 10 A @ Ta 40 °C / 250 VAC; 50 Hz

Ratings UL/CSA 1 - 10 A @ Ta 40 °C / 125 VAC; 60 Hz

Those parts are used by companies in Europe and USA to build electronic devices for the world market which are exported from Europe to USA or from USA to Europe.

But there are different versions of this socket for currents of 1, 2, 4, 6 and 10 A, I hope you got the right one for your project.

If you look at the diagramms for attenuation, they all start at 10 kHz, there is no difference for 50 and 60 Hz.