Synth Component

Synth component is a miscellaneous item in Fallout 4. It isn't particularly useful in itself, but the presence of it on a corpse indicates that the deceased was—perhaps covertly—a synth.

Characteristics
Stored in junk and can be broken down to plastic. However, better off sold.

Locations

 * Dropped upon death by Art during a random encounter and Amelia Stockton during Human Error.
 * Can also be pickpocketed from Amelia Stockton
 * Dropped upon death by Danse, Jules, K1-98, Magnolia, McDonough, Sammy, Sturges and Timothy.
 * Random settlement settlers and brahmin are synths and carry a synth component as well. They seem to join settlements as synths and can randomly turn hostile and attack a settlement later in the game. Saving your game, then killing a settler is the only known method of detection, then reloading save. VATS does NOT reveal a settler synth. Any resistances seen in VATS are from equipped clothing or head gear.
 * Found on Fred who openly admits he is a synth and is then threatened in a random encounter.