New i2800 to Cisco 93180YC-FX3 Twinax

Angling-Nut Sadly sometimes they do work and sometimes they don't depending on the vendor. If you plugged it in and cabled it up but you aren't seeing the link come up I would venture to say it does not work. On a side note, if you have an unsupported SFP in your device and you encounter issues that require a case do be opened with F5 they will most likely request that you replace the SFP with a supported one and test again.