Hi Chris, I have to agree with grumpy here that Penetrene is the way to go. CRC and WD 40 are good products for displacing water, fixing squeaking hinges etc but not for penetrating stubborn rusty threads. A good long soak with Penetrene will often do the trick easily.
Please do not PM me asking for support. Please post your questions in the appropriate forums, as the replies it may receive may help all members, not just the individual member. Kindest Regards, Darryl