Instructions for Wire, Non Electrical Brass, Screwed No2 Standard

[Son]

Yep.... brass threadwire used for fixing cracks in butts!

The book calls for the crack to be clamped shut and a hole drilled using a No 49 (0.073inch) drill. The threadwire is then gripped in the chuck of a hand drill and screwed into the drilled hole, care being taken that the crack does not open during this operation.
Remove the protruding ends of the wire and file smooth.

A number 49 drill is equal to 1.85mm or 0.0728inch.... If you do not have acess to number drills, I would think that a 2mm hole, being only a bit more than .005" bigger, would do the job. Perhaps anyone wanting to be sure should try a 2mm drill in a scrap bit of wood. The best way to drill the hole precisely is to pre drill undersize and finish with the 2mm

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