Energon chain

If a Transformer needs to restrain another one and more sophisticated means aren't available, they can always fall back on simply tying them up with energon chains. Energon chains are usually applied with the aid of an energon chain gun which doubles as the chains' generator. If the gun is destroyed, so are the chains.
Fiction
Generation 1 cartoon continuity
The Transformers cartoon

After defeating them in battle at the Great Falls Megatron had a group of Autobots collected, wrapped up in energon chains and lined up for their executions. Before the Decepticons could fire at their helpless foes, backup arrived in the form of the Dinobots. With the Decepticons busy, Wheeljack made his way to his comrades. He used Sideswipe's flare gun to dry them off and Bluestreak's gun to re-energize them and this made the chains disappear... somehow. Don't ask. S.O.S. Dinobots
Legends comic
Clouder restrained Devil Z with energon chains when the malevolent spirit was causing chaos in the Legends World. Bonus Edition Vol. 60 He later broke free with Chōkon Power. Bonus Edition Vol. EX
G.I. Joe vs. the Transformers

Though not specifically called such, Perceptor seemingly used energon chains to restrain Starscream. G.I. Joe vs. the Transformers II #1
2001 Robots in Disguise cartoon

When the Predacons had captured Side Burn, Dark Scream shot him with energon chains. And when Optimus Prime came to rescue his soldier, he too was tied up. Megatron proceeded to beat up his enemy in preparation of killing him but was prevented from doing so because Prowl destroyed the energon chain gun, thus freeing his comrades. Sideburn's Obsession

Timelines
After the Tripredacus Council blew up her ship for failing a mission and becoming a liability, Descent into Evil Flamewar was presumably held by energon chains upon reactivating under the questioning of Predacons disguised as Autobots. Intimidation Game
After falling into a Predacon ambush, a heavily-damaged Wing Saber was held captive in energon-based bindings by Steelgrave, who even disabled her combat abilities to prevent her from causing any more trouble; this did not stop her from using her wings to slash through her bonds anyway. The Razor's Edge
Spacewarp's Log
After stealing a rare statue for the offworlder B'hgdad from a Transtech auction, Treadbolt and Spacewarp found themselves double-crossed by the criminal who had hired them, as he intended to use an independent party as patsies to steal the statue and be turned in to the local authorities; he left both tightly shackled in Energon chains and/or Energon bands with their Mini-Con partners locked in their alternate modes. However, some quick thinking and misdirection on Spacewarp's part allowed her to grab the device which controlled their bindings, letting the two bots free themselves and their Mini-Cons to deliver the beatdown. Spacewarp's Log (1), 2015/10/29
Games
Transformers Legends

Energon chains were one means by which Transformers could be trapped. Unlike Energon Nets, chains were able to restrain even the mightiest warriors. Transformers Legends
Notes
Foreign names
- Japanese: Energon chain (エネルゴンチェーン enerugon chēn)


