Scrap: Scavenged Scrap

Scrap: Scavenged Scrap is a currency. It can be used by any character in a player's legacy. Scrap can be used to purchase items from Hadir, Izzar, or Mnek in the Cartel Bazaar on the fleet.

Source
Scrap: Scavenged Scrap can be obtained as a heroic mission reward, a personal conquest reward, or as a tier 1 Strength in Allies login reward.