I am an aircraft mechanic by trade. I have noticed on the Snap-On truck that I buy tools from, that there are no "thread chasers" smaller than 10-32. At least in the kit that I bought. I inquired as to whether smaller chasers were available, and was told they were not. I was told that the thread chaser is basically a hex-headed bolt with grooves cut parallel to the shank to allow the crud a place to accumulate as the chaser is run into the hole; just like a tap. The chasers are sized to remove debris from the space in between the peaks and valleys of the threads. I would surmise that a fella could make his own thread chasers by cutting grooves in a screw, and then cleaning said screw up with a die. Just my .02, but since there seems no solution to the problem yet, I thought I might take a stab at it to help a guy out.

Respectfully,

Kevin