A question: I am interpreting IPC-A-600, 2.10.3 Annular ring-suppoerted holes as: Annular ring less than .002" at any point around the circumference is considered breakout. Any area with breakout (< .002") for 90 degress or more around the circumference is not acceptable (class 1-2 supported hole) I had someone tell me that even when there is no visible annular (measureable to .002" or greater)ring for 90 degrees or greater, you should take into account the thickness of hte hole barrel/wall, there is enough plating around the hole wall to meet the requirements of IPC. I find this hard to believe, and would appreciate other opinions. G~ _______________________________________________________________ Get Free Email and Do More On The Web. Visit http://www.msn.com ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ##############################################################