Yeah, I've had guys from Ford call me and try to tell me what sizes are in the Torx Standards. Uhh...sorry dude but I'm holding the master copy of the book here on my desk and there isn't a T37 in the book. There have been a ton of aftermarket bits made over the years in odd sizes to fit exterior parts that have paint and clear coat in the recesses so that standard bits won't fit without hammering them in. But the list of the actual punch sizes that are supplied to the screw and bolt makers hasn't changed any since about 1984 or so. We spend a lot of time tweaking gages and coming up with special recess depths for yield bolts and very special Torx Plus recess depths for Boeing in the 787 fasteners.

