NoticeConversion of Fein item numbers to Würth item numbers.
The three digits after 639 03 ... in original Fein numbers are crucial...
If the number begins with 0, e.g. 095, the 0 is replaced by a 5 and the result is given the prefix 0696
If the number begins with 1 or 2, e.g. 126, a 5 is inserted before the 1 or 2 and the result is given the prefix 0696
