Re-key different brands
#2
Hard telling. You haven't provided any info on the type of lock the Hillman key fits into. When you say Hillman, to me, that is the brand name stamped on the key. Hillman key machines are in about every hardware store there is. It could literally be for any kind of lock out there... One of 400 or more styles of key. You haven't told us what that key fits. (The brand and model of lock it fits) So there is no way for us to say if the key in your hand interchangable with a Yale lock. We cant see it.
#3
If it's an ordinary lock chances are there will be a Hillman blank to fit the lock. But you need the original or master key to copy from. Hillman does not make locks, they make keys to fit locks made from master keys.
#4
I'm hoping you mean "Can a Yale lock be rekeyed to fit a Hillman key?"
Yale has dozens of keyways, but without knowing the particular keyway you're talking about, the answer is YES, but only IF the Hillman key can be inserted into the Yale lock, AND the Hillman key is of similar length, ie., 5-pin key into a 5-pin lock, AND we're talking about regular garden variety locks, not specialized high-security, etc.
How's that for caveats...?
Yale has dozens of keyways, but without knowing the particular keyway you're talking about, the answer is YES, but only IF the Hillman key can be inserted into the Yale lock, AND the Hillman key is of similar length, ie., 5-pin key into a 5-pin lock, AND we're talking about regular garden variety locks, not specialized high-security, etc.
How's that for caveats...?

#5
Lets start from the beginning. To answer your question the way you asked it...NO!
However if the Hillman key originally fit the lock then another copy can be made from that copy. Not the best but it can be done. Using original or master keys are best to make copies. A locksmith worth his salt can make a key from just the lock itself if you lost the original. And most locks can be re-keyed to match other locks in the home.
Have we beat this horse enough yet?
However if the Hillman key originally fit the lock then another copy can be made from that copy. Not the best but it can be done. Using original or master keys are best to make copies. A locksmith worth his salt can make a key from just the lock itself if you lost the original. And most locks can be re-keyed to match other locks in the home.
Have we beat this horse enough yet?

#6
the simple answer to this question is......
if the key you want your lock rekeyed to, slides into the keyhole, then it can be made to operate that lock cylinder. If it wont slide in, it cannot be rekeyed to that key.
if the key you want your lock rekeyed to, slides into the keyhole, then it can be made to operate that lock cylinder. If it wont slide in, it cannot be rekeyed to that key.