I found a different style bolt holding my oil filter adapter on my 93 Cherokee Sport today.
The parts guy at Oreilly's told me that the three o rings were in a "HELP" package (?!?) but he was correct, for my 93 with my style of adapter but does NOT have the o rings needed for the earlier housing that uses a hex head bolt to retain it (which I got off another '93 ?!?!?!).
OK, here we go: after jacking up the motor, I could access the bolt and i had my trusty T60 ready to go, but it didn't fit right. I could feel a T45 loosely rocking around in a smaller hole deep inside the main hole. It took a chisel bit inside an air hammer to turn the bolt loose.
When i got it out, I took a look inside. The main tool hole for the bolt was a 9/16ths allen socket, and in the bottom of that, there was another allen hex hole that wasn't even formed in the center. Installation was a breeze, as i just knocked the allen portion out of a 9/16ths allen wrench socket and used a ratcheting boxend wrench on the hex itself.
So, if you have a 9/16ths hex bar or allen wrench, cut off about 1 1/2 inches and use that to crank her out.