OEM JZA80 Supra / JZX100 Chaser / JZZ30 Soarer Gearbox Mount Nut.
This is the nut that attaches the gearbox mount to the crossmember.
Note: This doesn't come in original packaging as Toyota doesn't sell them individually and I buy them in bulk to make sets. This listing has the option for a single nut and a set of four.