Hey Sabre! I’ve started reading Celestial Navigation – which I
love so so much, even though A/B/O is not my thing, the caracterisation
is amazing – abd I’ve been wondering if you know any other fics that
feature Steve’s dog tags, especially if he gives them to Tony. I’ve just
become obssessed with the idea of Tony wearing Steve’s dog tags aroung
his neck!

I love that trope!  Obviously. Thank you for reading CN.  Glad you are enjoying it. Check out these other “dog tag” fics:

IDENTIFY YOUR LOVE WITH COMMENTS AND KUDOS!

Dog Tags by jynx:
Tony really, really likes Steve’s dog tags

Dog Tags by SuperNova53:
Steve gets home late one night still wearing his dog tags. Tony has a thing.

Dog Tags by rainlady:
They handed him Steve’s dog tags.

Captain Steve Rogers is the Largest Sap in All Known Universes (And Tony Stark is a Sucker) by LemonSchwaySchway:
Steve doesn’t have much need for his old dog tags, so he gives them away.

Can You Really Blame Him? by Heartithateyou: Steve sees Tony wearing his old tags and realizes he likes it.Like really, really likes it.

A Sentimental Gift–Or Tony Stark Makes an Ass out of U and Me by thescarletwoman: Steve decides it’s time for a big step in their
relationship. Tony misunderstands and blow things out of proportion as
he always does. Written for the following prompt: Stony smut:
Steve gives Tony his dog tags. Love making happens, with a lot of dog
tags kinks, like how much Steve loves seeing them moving between their
bodies.

Yours, Steve by soniclipstick: Tony has read the news, he’s seen footage of the
infighting and the arrest and Steve’s bloody body on the courthouse
steps. He might not remember, but he understands why Steve can barely
look him in the eye anymore. But there’s a ring on the chain of a
set of dog tags that have no business being in Tony’s safe. And it fits
his finger perfectly.

Property of Steve Rogers by Dweebo:
Just the thought of someone looking at Tony with lust or someone even
thinking about Tony sent Steve off the edge. Tony was the center of his
universe, and he wanted to keep it that way.

Tags by yasminakohl:
They all noticed it from time to time, but it never dawns in any of them
what it meant, or that it should even mean anything.It showed up about
six months after The Avengers moved in to Starks Tower. It, was
something blocking the light from Tony’s reactor. Wasn’t large, not much
bigger than a fifty cent piece. If
any of them had thought about it, they passed off as something Pepper
had given him but then they found out Tony and Pepper had split about
the time The Avengers moved into the tower.  But none of them knew that
because Tony never said anything and Pepper was still showing up, still
brow beating Tony into doing Stark Industries business. But then as CEO
that would still be her job.It all looked the same. There were
never any girls and they all knew Tony wouldn’t deny his sexual
appetite. So even though Tony was around two master assassins, another
certified genius, a demigod (though not all knowing) and a super
solider, none of them mentioned it.

Highest Fall You’ll Ever Grace by @laireshi​:
“You’ll probably want these back,” Tony says at last,
and it hurts almost physically to pull the dog tags over his head and
offer them to Steve. But they never really belonged to Tony, did
they?Steve seems to hesitate for a second, but then he takes his dog
tags with a weird expression. “Yeah,” he says. “They’re mine.”

Dog Tags by AkikoFumi  @ir0nshield​: Steve’s birthday is coming up, so naturally Tony is trying to find the
perfect gift for him. And no, that doesn’t mean giant stuffed animals.

I Don’t Need a Ring (I Just Need You) by overthehill:
Steve and Tony are officially a couple…now if only there was a symbol to show it.

Shrapnel by schweet_heart:
Steve is missing, presumed dead, and all Tony has left are his dogtags and a shitload of survivor’s guilt.

The Captain America Guarantee by @arukou-arukou:
The relationship between Tony and Steve is still so new that Tony’s not
exactly sure what will happen when Bucky Barnes comes roaring back into
the picture.

From a prompt by comeswithaprice.
She gave an open plea to tumblr for Cap gifting Tony with his dog tags
and then the two of them having fantastic sex. I had planned for this to
be a lot more waffy, but my angst complex made itself entirely too
known, I fear. Enjoy!

To Give You My Heart by @queendophne​:
Steve wanted Tony to have them. He didn’t expect anything in return.
Tony wanted to return the favor. What do you give someone who gave you
their heart? You give yours in return.

Searching for Meaning (the Secret Dreams Remix) by antigrav_vector:
Steve loves it when Tony lets him be possessive, but there’s something he’s been holding back, unsure how Tony will react

Sixpence in His Shoe by @scifigrl47: Steve and Tony should really read the fine print on what they’re signing.  Then again, some mistakes are not really mistakes.(thanks to @pocketsizedsleuth for the suggestion)