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A Springlock suit is a special animatronic that can be used as both an animatronic and suit. In order to turn the animatronic into "suit mode", you will require a special crank which pushes the endoskeleton and mechanical gears to the sides of the suit, making just enough space to wedge a person inside. The two most notable springlock suits are Spring Bonnie and Fredbear.

Springlock failure

A "Springlock failure" is one of the many incidents that has happened at Fazbear entertainment restaurants over the years. These incidents occur when the locks, that are holding the endoskeleton in the folded position, break. This causes the endoskeleton and gears to spring into its usual position, anyone caught inside the suit when this happens will be impaled and crushed by the parts. It is, however, possible to escape the suit before the injuries become fatal as shown by William in the novels.

A fan theory is that Shadow Freddy and RWQFSFASXC are 2 employees at Fredbear's that experienced a Springlock failure and died from them, Shadow Freddy being the employee that died in the Fredbear suit while RWQFSFASXC is the employee that died in the Springbonnie suit, this theory likely came about from the line where phone guy states that the sister location experienced multiple and simultaneous spring lock failures. However, this theory was later debunked by Scott.

How to cause a Springlock failure

There are two known reasons Springlock failures can occur, one of these is when the springlocks interact with water and moisture, for this reason employees must not wear the suit in rooms with too much moisture in the air. (This was the fate of William Afton who died inside the spring Bonnie suit when the springlocks failed. This happened as the ceiling appeared to have a leak and the rain water combined with William’s heavy breathing, as he had rushed to enter the suit, set the spring locks off.) The second way these accidents can occur is when an employee fails to correctly wind the springlocks all the way up, causing them to burst on the person inside.


Five Nights at Freddy's 2

On Night 6, Phone Guy mentions a spare suit in the back - specifically a "yellow one". He states that "someone used it", seemingly causing the animatronics to behave strangely. This event is most likely referencing the Missing Children's Incident, in which 5 children were lured to the backroom by William Afton where he mutilated and murdered them all.

Five Nights at Freddy's 3

Main article: Springtrap

The Springbonnie suit now known as Springtrap makes an appearance as the main antagonist of the game, Springtrap would later be revealed to be the old Springbonnie suit and the decomposing corpse of William Afton after a Springlock failure, Phone Guy also mentions the the Springbonnie suit has been moved, further hinting that Springbonnie was used by William to murder the 5 missing children.

Five Nights at Freddy’s 4

Springbonnie and Fredbear, the two original springlock suits, make an appearance in the minigames. Fredbear was also revealed to be the cause of the Bite of 83. This was believed to be one of the Springlock failures phone guy references when he talks about then in a phone call to the player.

Sister Location

Main article: Springlock Suit (Sister Location)

A Springlock suit makes an appearance in Sister Location. Circus Baby uses it to hide Michael Afton after Funtime Foxy knocked him out. she then opens the faceplates to reveal Michael to the security cameras so people could find him, however it also reveals his location to the Minireenas. Michael has to shake them off while also rewinding the springlocks so he’s not the next victim of a Springlock failure.

Springtrap also appears in a cutscene.


Springtrap, now known as scraptrap returns in Freddy Fazbear's Pizzeria Simulator as an antagonist once again, he is greatly damaged when Henry burns down the establishment, yet he makes a return as burntrap in Five Nights At Freddy's Security breach


Main article: Fredbear

3 Springlock suits appear in Ultimate Custom Night; Springtrap, William Afton/Scraptrap, and Fredbear, with Fredbear being a secret antagonist.

Security Breach

Springtrap returns in Five Nights At Freddy's Security breach as a final boss for the secret ending. He is visibly burnt to a crisp, supposedly from the fire started by henry. As such, he adopts the name burntrap.


  • A Springlock is real type of lock, it has a spring-loaded bolt that requires a key to open it.
    • Real Springlocks could be the cranks used to turn a springlock suit into suit mode.
  • Due to Golden Freddy being a Springlock Suit, there appear to be no visual indicators on which suits contain Springlocks
  • All Springlock suits seen externally so far in the games are golden.
    • It is unknown however if the Springlock suit in Sister Location is golden as it is always seen inside of it.
    • However, a blue Springlock Suit was seen in The Silver Eyes graphic novel, proving this is not a requirement.