I had always assumed the "10" was the number of 1/64s since I have found 1/8 inch and #8s to be relatively interchangeable. But of course after I went searching I discovered I was incorrect. Judging from the table at the link below, it is the number of 1/80s greater than 0.0600 inches (the actual change is 0.013 which is 1/80 rounded to two significant digits).
The next smaller size is an 8 which is 0.1640 in Major Diameter. Standard machine screw sizes with associated drill sizes: http://www.engineershandbook.com/Tables/taphole.htm -- wesley scott k...@spottedowl.biz Bryan, TX Message: 13 List-Post: krnet@list.krnet.org Date: Tue, 6 Dec 2005 18:43:05 +0100 From: Serge VIDAL <serge.vi...@sagem.com> Subject: KR> Nuts and bolts To: KRnet <kr...@mylist.net> Message-ID: <offb4e9ea0.1dd77852-onc12570cf.006104e3-c12570cf.00615...@sagem.com> Content-Type: text/plain; charset="us-ascii" Could somebody well versed in the secrets of the Imperial system tell me: 1 - When a thread size is expressed at, say, 10-32, what do the "10" and the "32" stand for? 2 - The AN system starts at AN3, which is 10-32. What would be the next smaller size in the standard Imperial system?
