Thackray scored five tries in 27 games last season (Getty)
Former Great Britain prop Jamie Thackray has rejoined his former club Hull FC until the end of the season.
The 28-year-old left Super League leaders Leeds Rhinos by mutual consent on Wednesday.
"He'll strengthen our squad and as we know from his time at the club he can provide an explosive impact to games," said FC chief executive James Rule.
Hull are currently suffering an injury crisis to their front row with Garreth Carvell and Ewan Dowes both ruled out.
Thackray has won three caps for Great Britain but was not part of the Lions squad that beat New Zealand 3-0 last year.
He was a member of Leeds' championship-winning team in 2007 when he made 27 appearances.