Question: what are flare nut wrenches for?
Answer: What is a Flare Nut Wrench? Flare nut wrenches are a type of open-ended wrench that's intended for use with hexagonal nuts and fittings, which are sometimes referred to as flare fittings. ... Flare nut wrenches can also be found with hinged heads, allowing users to reach connectors in harder-to-reach places.