Talk:Drill and tap size chart

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[edit] UNF vs UNC

On the Drill and tap size chart, the chart shows a 10-24 tap uses a #25 drill. I am using a 10-23NF tap and both the tap and drill indes and a drill and tap set I bought from Home Depot made by Irvin use a #21 dirll. Is the difference because of the threading???

Robert Heard bobn5jmq@yahoo.com

Yes. See here --Coolhandscot 07:36, 19 August 2006 (UTC)
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