Very possibly the actuator pin that connects the key cylinder to the ignition switch. Here is what the pin looks like if it breaks (a common problem).
There are a couple of security bolts that take a security t-10 bit, but I’ve read that you can break out the center pin with a small screwdriver & use a standard t-10 bit.
Here is a link with a u-tube video of removing the actuator pin.
Actuator pin video