What is the Name of the Tool to Remove this Nut?

[skipgundlach]

I chuckle at those who come late to the party and don't bother to read the already-solved posters' comments...

[Wotname]

^^ me too

[Wotname]

Originally Posted by MBWhite

Congrats on getting it off!

For the sake of completion, that nut style is called a "Double D" since it looks like two letter "D"'s placed back to back.



You can also search the term "Spring Shackle Bolt" but nowadays you will see them on small carburetor adjustment screws as about the only place they are common. I suspect that one was put there since it was on a rotating item as a safety measure so it would be less prone to catch a shirt sleeve (lawyer stuff I suspect but don't know for certain)

Glad you got it off! If I had to make a tool I would use a cheap thick wall socket and cut 4 of the flats off, leaving only 2 parallel sides to turn the flats but as you have shown there can be several ways to get a nut off.

Belated update - I did end up making a custom socket for refitting the nut as it made it much easier to torque it correctly.

[Delfin]

Originally Posted by newhaul

In this case as well as rounded nuts I would use a gator grip socket and breaker bar.
https://www.amazon.com/Original-Univ.../dp/B000065CJ8

That's a cool tool....

[charliehows]

it is a frustrating question -why do these engines use such odd fixtures - my 2qm20 has a lower front water galley anode nut that is square - fortunately the same size socket that undoes the upper galley anode hex nut also coincidentally fits the lower square one. Can't replace it with a hex because it's a machined fitting that the anode screws in to on the inside. ber-loody annoying.