Seat bolts: need helping identifying head type

[WeeYari]

Originally Posted by MyBlueYar

I tried filing down the edges of the one remaining bolt on my Yaris seat, only to find out that there are no metric or SAE sockets which fit the tiny head size once filed down.

Of course there are. My kit has 4mm as the smallest.

[MyBlueYar]

Originally Posted by WeeYari

Of course there are. My kit has 4mm as the smallest.

Perhaps I misworded my previous comment WeeYari. With the nubs intact, the seat bolt accepts an 8mm socket. My problem, however, was once I filed off the nubs as per sh0rtlife's suggestion, I was in no man's land between a 7mm and 8mm as far as fitting.

My socket set also goes down to a 4mm like yours - however - to reiterate, the conventional socket sizes do not align with what I need.