"Get cut number 5", she said. "You can use number 6 as well, but you like it better when I make it with 5".
This app helps you match the Israeli beef cuts to the US ones.
Note that there isn't necessarily a one-to-one correlation between the cuts, the meat is cut differently in each country.
Give it a try and let me know if you want some of my mom's recipes, it'll make her happy!