So as you all know, that pesky oil pressure switch i had to rig fittings in to get the sensor hooked up and tryed some thread locker but that only holds when its not hot. i noticed some of the thread was taken out(i think i cranked on it too hard) and here's what i got probally gona replace the one with damage threads but before i do that, these fittings i believe are metric(13 on the one that connects the bottom to the top and 11 on the bottom). Everything threads fine, but i figure ill ask if any knows if these are the exact correct fittings to use. Im gona use the black rtv since i think its stronger then the thread locker. better to be safe then sorry(sorry im asking so many questions i wasnt around when the car was being taken apart so i have to figure everything out and its my first rebuild :? )