Good Morning Keith, The easiest solution is to create a note on your drawing that states the maximum lead protrusion shall not exceed .xxx". The drawing requirments take precedence over any referenced standard unless otherwise stated in contractual documentation with your customers. The additional drawing note can limit the applicability of the "excess" lead protrusion by stating "for leads of U1-U4, S1" etc. Steve Sauer Mfg Engineer Northrop Grumman, Xetron -----Original Message----- We are having a vigorous discussion about how to deal with lead protrusion on our thru hole boards. We build mainly IPC class 3 boards, Our area of concern is DIP packages along with sockets, and connectors. When we insert DIPs we clinch two opposing corner pins, connectors and sockets are retained with temporary solder mask (goop). we are finding that the leads on these parts tend to exceed the max lead protrusion permitted for class 3 boards when used in .06 nominal thickness boards, but do not want to get into the quagmire of trimming leads and inspecting or reflowing after trimming. These boards will meet the class 2 requirements, and there is no danger of violating the minimum electrical spacing requirements when these boards are installed in our systems. Anyone else having this problem? If so, how did you resolve it? Your support is greatly appreciated. --------------------------------------------------- Technet Mail List provided as a free 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/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------