Ken, Don't read too much into the title of a chart. Different CAD systems have different default titles for those tables. Look at the information in the larger context of the fab drawing. "Drill Chart", "Hole Chart", "Drill Schedule", "Hole Schedule", "Drill Table", etc. are all titles I have seen. What's important is whether the information within the table indicates that the size given is for the finished hole, and whether the hole is plated or not. That will determine what size YOU need to drill at. A rule of thumb for creating an engineering drawing is that the drawing depicts the end product. Also, check the notes. Sometimes there will be a note telling the reader that all hole sizes given are "finished" size. Again, read the whole drawing and put that table into the context of the overall drawing. Michael Hiteshew Lockheed Martin Launching Systems [log in to unmask] (410) 682-1259 Ken Patel wrote: > What is the different between Hole Chart and Drill Chart on fab drawings? > ################################################################ TechNet E-Mail Forum 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's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################