cabinet

Hi all, I am having trouble identifying the following kitchen cabinet hinges. Another door with identical hinges requires replacement as the 'turret' bits (???) have broken where the screws affix. https://imgur.com/gallery/VdZaGE1 I've looked on www.mcmaster.com and various retailers but no...

And another question. Is there any reason why I would need a 450 mm deep 6U wall mounted cabinet rather than a 300 mm 6U cabinet? The cabinet will be for housing a 24 patch panel (cat6 or maybe cat6A), plus a 24 port network switch (they seem to be between 200 to 250 mm deep), and maybe a...