Sunday, July 15, 2012

A Mystery Thread Chaser

The business end's thread is 7/16"-27. 7/16"-27 is a listed UNS (UNified Special) thread, but I've never encountered an application of it. I suspect it may be used in some sort of pipe-fitting fastening.

The tool doesn't look like it's ever been used. I'll stash it in the drawer where I keep all my odd taps and dies.

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