Biggest threat is "I'm going to leave", but you need to credibly be willing to do so. And you don't need to say so _explicitly_.

1. Biggest hammer, but the most work: you get a job offer elsewhere for job you are willing to take, at higher pay, and see how it goes.

2. Less work: figure out coworker salaries. Figure out salaries in your geographical region. If you can show you are underpaid you are implicitly saying "look I can go get a job elsewhere for more" without having to do the interviewing.

3. Important—make sure you ask for higher salary _before_ the meeting. By the time the meeting happens they've probably decided on salary.

Much more detail here: https://codewithoutrules.com/2018/08/22/engineer-a-raise/