Howdy fellas, its been a while since ive been on but i have recently run into a problem. Yesterday i was driving and started hearing a rattle coming from the right side of my car (1980 rx7). I took off the wheel, because the nut holding the strut into the tube has come loose on me before, but it was fine. After looking around under the car, i see the that drivers side of the transmission mount is hanging down super low, the nut and bushing is completely gone. Ive replaced the central mount, but this is the mount from the cross brace thing to the chassis, the nut is mia.

To the question. Does anybody know the size and thread pitch of the missing nut? I cant find any info online, and am hoping i can run to home depot and get a nut to throw on there until i can source the bushing and proper nut.

Thanks in advance,
Seth