Crack The Safe - ???
Wolfmother is correct with
260343.
There was confusion over this until T5 explained more on Facebook:
One Of Many Queries: In Take 5 issue 39, puzzle 38 there is no way you can't use the same number twice. D x F = 9 has to be 3 x 3 but you can't use the same number more than once.
Take 5 Reply: the puzzle itself is correct, but unfortunately the instructions are open to interpretation, and hence are a little misleading. Written in a clearer manner, the instructions should have been interpreted as meaning that only one number can be attained from each lock combination, not that a number cannot be used more than once within the entire puzzle.
Sorry for the confusion this has caused. Please use any number to solve the puzzle, whether or not it is repeated.