Need help! Engine mount installation...

[enjoyminutemaid]

I installed right and left side Group N engine mounts last night on my 2009 WRX sedan base model. I got everything in fine and when I got to tightening the last nut on the driver's side mount (the nut that goes onto the stud attached to the mount) I over tightened it and now it just keeps turning but doesn't get any tighter, I can still take it off though. To be clear, each mount is attached to the car with two bolts (that go through the bracket) and one nut that goes onto the stud that sticks out from the lower side of the engine mount and goes the through hole in the subframe. I think I damaged the threads of the lower nut but I'm not sure where to pick up a new one. Does anyone know what the part number for this piece is or where I could order a new one?

Update: I found the part number I was looking for, but since I couldn't find anything on the forum already I figured I'd add a little bit of extra info. For the 2009 and probably 2008 wrx's, the stock engine or motor mounts are one solid piece and do not come with a separate mounting bracket like the ones on older wrx's or the Group N mounts. The problem for 08-09 wrx owners is that when you order the Group N engine mounts from the accessories catalog (I ordered mine with Subaru Reward Dollars), the mounts do not come with the necessary installation accessories. If you have an 08-09 wrx and plan on installing the Group N mounts, you need to also purchase 4 nuts to go on the studs on the upper side of the mount so that you can tighten the bracket to the actual mount. Here is a list of part numbers associated with the engine mounts:

Part #:
901120096 - bolts that go into front and back of bracket and screw into the engine block, 4 total between the two mounts (note: these nuts should already be included on the stock mount so you can reuse them)
023810006 - nuts that go on studs on engine mount, 3 studs per mount, so 6 nuts total (note: only two nuts are used on the 08-09 wrx's, so to install the Group N mounts, you need to purchase 4 of these)
903100158 - washer that goes in front of nut that attaches to single stud on bottom side of mount, 1 per mount, two mounts, so two washers, I have not been able to find this part on any online OEM catalogs, but a subaru parts rep gave me the number (note: these washers should be included on the stock mounts for all wrx's)

Most of the Engine Mount installation guides or how-to's are for 02-07 wrx's but the 08-09's have slightly different mounts but the procedure is the same (aside from needing to purchase 4 stud nuts). If anyone has any questions, feel free to pm me.

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