We've had problems with this in the past so maybe the group can help me out. I have a mill-max receptacle pin with a .040 diameter. The datasheet calls for a .042 minimum dia. plated through hole. Is it better to call out a .048 hole with a +/- .003 drill tolerance? (because if you stack the .003 positional tolerance as well, you could get down to the min. .042 hole). Or is it better to call out a .047 hole with a +/- .002 drill tolerance? (because with the .003 positional tolerance you could get down to the min. .042 hole). Or does this depend on which board house you go to as well? John --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------