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"YOU CANT" This article contains new content, and will contain spoilers. |

The inside of a Springlock Suit.
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 deactivates the animatronic, and pushes the animatronic endoskeleton into the inside lining of the suit. The endoskeleton is held back by spring locks. Due to this, at least one person has enough room to enter the costume.
However if the wearer is exposed to any moisture, the springlocks will trip and the endoskeleton will crush the wearer in an instant, making for a slow, painful death.
Springlock failure[]
Main Article: 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 springlocks that are holding the endoskeleton in the folded position trip. This causes the endoskeleton and gears to spring into their 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. When the suit is in animatronic mode, it is limited by its programming, as can be seen when Springtrap was able to be led around by the sound of a child's voice.
How to cause a Springlock failure[]
There are a few known reasons Springlock failures can occur. The first 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. 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. The third way is by sudden/violent movement, as seen in The Silver Eyes when Carlton wakes up inside an old Springlock suit. The fourth is by interacting with the springlocks when wound up.
How to avoid a Springlock failure, to prevent it from being fatal, or when death is likely[]
Note: These steps are derived from the identification of Springlock failure causes and canon material.
Keep the suit relatively dry and well maintained, as wear over time may render the suit unsuitable for use, and moisture can loosen the springlocks. Be careful not to interact with the springlocks when wound up, as that may also loosen them. Do not make any quick or sudden movements, or avoid knocking against any part of the suit, as these actions may dislodge one or multiple springlocks. Ensure that the springlocks are properly wound up as negligence in this activity may present the springlocks as hazards.
In the case that a springlock has failed, it is advisable to stay calm, move away from the area, restricting movement to what is absolutely necessary, and avoid touching any more springlocks, or moisture of any form until a work associate is available to wound up the springlocks to safely allow the suit to be taken off. The sudden surprise of a springlock failure may make the action of staying calm difficult, leading to more springlocks failing as the victim may make sudden movements from the shock.
If most, or all of the springlocks have been released, move away from the party area and find a suitable place to bleed out and die.
Story[]
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, or his ultimate death.
Five Nights at Freddy's 3[]
Main article: Spring Bonnie
In this game, the concept of a Springlock Suit is revealed through Phone Guy's old tapes. Despite Phone Guy mentioning in the training tapes that the suits were incredibly dangerous, they were continued to be used until a springlock failure incident occurred at an unnamed sister location. Due to this unfortunate event, the suits were decommissioned permanently, and moved into the Safe Room. Phone Guy also mentions that the Spring Bonnie suit has been moved, further hinting that Spring Bonnie was used by William to murder the 5 missing children. Spring Bonnie is seen in the Safe Room in the Night 5 Minigame. Here, Afton hides within the old suit, only for it to fail on him, leading him to bleed out, and eventually become Springtrap.
Five Nights at Freddy’s 4[]
Spring Bonnie 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 the Phone Guy references when he talks about them in a Springlock Training Tape.
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. Baby then opens the faceplates to reveal Michael to the security cameras so the techs working in that shift could find him, however it also reveals his location to the Minireenas. Michael has to shake them off while also re-winding the springlocks so he’s not the next victim of a Springlock failure.
Springtrap also appears in a cutscene, set after Five Nights at Freddy's 3.
FFPS[]
Springtrap, now known as Scraptrap returns in Freddy Fazbear's Pizzeria Simulator as an antagonist once again, now in a new Spring Bonnie design. The pristine Spring Bonnie is seen in the minigame Fruity Maze, where Afton lures away Susie. Scraptrap is ultimately burned by Henry in the Completion Ending.
UCN[]
Main article: Fredbear
3 Springlock suits appear in Ultimate Custom Night; Springtrap, Scraptrap, and Fredbear, who serves as a secret antagonist.
Security Breach[]
A Spring Bonnie suit seems to appear in Five Nights at Freddy's: Security Breach in the form of Burntrap, in the so-called "Burntrap" ending.
FNAF: The Movie[]
Three Springlock suits appear in Five Nights At Freddy's: The Movie; Spring Bonnie, and a Springlock Suit of Ella that the animatronics try to stuff Abby into. While not revealed in the movie itself, behind-the-scenes images reveal that Sparky is also a springlock suit. In the movie, when Carl, the cupcake bites William's suit, we see that the springlocks are triangle shaped and they have these cylinders, that impale William at the end of the movie.
Trivia[]
- 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.(So the cranks are THE springlocks?)
- Due to Golden Freddy being a Springlock Suit, there appears to be no visual indicators on which suits contain Springlocks.
- 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 Spring Bonnie suit.
- This theory likely came about from the line where Phone Guy states that the sister location experienced multiple and simultaneous spring lock failures.
- It's worth remembering that the Spring Bonnie suit was at Freddy Fazbear's Pizza at the time of these tapes. Because of this, this would only be possible if these failures happened before the location opened, and was only discovered later on.
- Another detail worth remembering is that, while the springlock failures were mentioned, it's never stated that the failures were fatal, or that multiple suits failed simultaneously. "Multiple and simultaneous springlock failures" could just as easily be referring to multiple springlocks in a single suit, as they can fail separately.
- 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 there is no perspective on its outside appearance.
- However, a blue Springlock Suit was seen in The Silver Eyes graphic novel, proving this is not a requirement.