While I have the subframe off to replace all the bushings, links, mounts, etc., I need to replace the driveshaft boots and relube the CV joints. When I got to the point of loosening the bolts that attach the halfshafts to the diff, I found that the allen wrench I thought would fit didn't. It was getting dark, however, and I couldn't see the area well enough to tell what type of bit it takes for sure. I think there were closely spaced internal splines, so could this be a XZN type fastener? (is that the same as a triple-square?) Anyone know what type and size bit to use on this and who might carry it?

Thanks,

Gary