Torx size T66, for oil filter adapter? Where can I buy?

I'm trying to replace the o-ring on my oil filter adapter and from what I have searched, it is size T66.

Ive gone to Advanced and Harbor Freight and they only carry up to a T60.

Where can I find the correct size? And is T66 the correct size? My jeep is a 1993 4.0 HO.

Never heard of a T-66. Mine was a T-60. Are you sure yours is a torx? Might be an allen. It's hard to see, but you can feel which one it is.

My 94 was a 14mm hex key, T60 is not uncommon and is the reported size. Usually found in a good torx set.

You guys may be right, from what I can feel it is a torx but it may be an allen. Theres so much grease and dirt caked up from the leak. I can't find that t66 size anywhere, so maybe what I read online was false.

I tried a t60, but it was way too small.

Thank you for the info, ill give the 14mm a shot.