Behind the Nuts starts with Tammy Tumbler during One Flew. Inside the factory, detour into Shipping & Receiving, talk to the foreman, inspect the crate holding the Experimental Nuts, and return them to Tammy for 3 Schematics.

How to start Behind the Nuts
When One Flew walkthrough goes live in your run, visit Tammy before leaving the hub. She asks you to recover a misrouted set of Experimental Nuts from the factory.
Some launch-week side-job coverage warned about occasional bugs around this quest, so keeping a manual save before the mission is still a sensible completionist habit.
Walkthrough
Enter the factory floor
Play One Flew until you reach the main industrial floor and interior offices.
Find Shipping & Receiving
Ignore the urge to follow the objective marker straight through. Instead, look for the door marked Shipping & Receiving.
Talk to the foreman
Inside, speak with the non-hostile foreman. He points you toward the correct crate.
Inspect the marked crate
Interact with the indicated crate to collect the Experimental Nuts. That completes the item step and lets you finish the rest of the mission normally.
Rewards
Tammy rewards Behind the Nuts with 3 Schematics after you turn the item in.
That puts it alongside Poster Girl as one of the strongest schematic side jobs in the game.
FAQ
Do you need a keycard for Behind the Nuts?
The clean route from current notes is to talk to the foreman in Shipping & Receiving and then inspect the marked crate.
Should you keep a manual save before this job?
Yes. It is a sensible safeguard for completionist runs because of launch-week bug reports around the quest.