Re: Metric/Standard Wrench/socket interchange list

Posted by humer On 2012/9/20 20:31:01

The 113mm and 1/2" are almost perfectly interchangeble. A good fit. As 25.4mm = 1" you can calculate the difference easily. So 1/2" x 25.4mm is 12.7mm. So the fit is within 0.3mm which is about a 2.4% ((13-12.7)/13 x 100) a small difference. This so small that there should be no rounding. For 9/16 =?14 mm: 9/16 x 25.4 = 14.29 which is 2.1%, a small difference also
Incidentely, the 25.4mm = 1" is not approximate but is an exact relationship.
So you can calculate the rest of the numbers and add this information to the original tabulation. Make a copy and post it on your shop wall or put it in your toolbox.
Humer