OK I FINALLY FOUND OUT WHAT THAT IS
IT'S CALLED A DRAIN PLUG !!!
https://www.hondaautomotiveparts.com
that's where i found it !!! it's under the cylinder block section!
I didn't hesitate at all and order it !!!
I think you might probably be able to get it at your local dealer !
but coz i called my local dealer, they said they don't have it, i would think the 90 % don't have stock of those stuff !
it will take weeks for them to order it !
so i ordered it online without any hesitation !!!
I hope it will arrive ASAP !!!
it cost around 12 bucks plus shipping !
i hope it's worth it !!