I just received my Greddy Oil Block Adapter today and I haven't actually tried installing it on my car yet but while putting it together...i noticed that when I screw the two fittings together...they dont hold tight against the whole adapter (the adapter can back and forth about 2/16in between the two fittings and spin...is it supposed to be like that? It seems like there is supposed to be a washer or something??? somebody please enlighten me!!

thanks in advance!