Snagged a new "toy". It probably cost too much but is something I wanted rather than needed. There was a post the last week or two about a tap for "6/16 inch". Curiosity about why such a numbering system. I snagged an entire set of "bicycle" threads, Sears & Robuck, that has a number of taps and dies(?) for such threads. I interpreted the 6/16 as 3/8 inch. Looking at the 1/2 inch dies, that looks reasonable. What got my attention was the odd thread pitches, 1/8-42 which equates to a Nr 5 screw size, 1/4-24 and 32, 5/16-22 and 26, and the like. Also a Left Hand 1/2-20 and 24. The odd thread pitches are probobly archaic and obsolete. I doubt I'll ever use them, but may do so just to mess with somebody's head. The 1/8 screw is likely a match for a "stove bolt" to my father's time when I was little. It'll take a week or 10 days to know for sure once it gets here.
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