Synth Component

Synth component is a junk item in Fallout 4. It isn't particularly useful in itself, but the presence of it on a corpse indicates that the deceased was (in many cases covertly) a synth, although this does not show whether they were a covert operative of The Institute or a freed or escaped synth possibly even given new memories and identity by The Railroad.

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

Locations

 * Carried by Amelia Stockton and Sammy.
 * Dropped upon death by Art, Danse, Fred Allen, Jules, K1-98, Magnolia, McDonough, 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, as well siding with any Institute forces that attack the settlement.