The midfielder, who can also play at left-back, arrives from Whitby Town having spent December with Daniel Moore’s side.
Hackett made two appearances for The Hornets during his initial one-month loan spell, securing wins away to Bridlington and Dunston.
The 23-year-old started his career with Sunderland before playing 78 times in the Pitching In Northern Premier League Premier Division for Whitby.
Click here to watch Hackett’s first interview back at The Green Energy Sports Ground.