Fellow TechNetters: Is it safe to stated that a SUPPORTED hole contains a plated through BARREL and an UNSUPPORTED holes does not contain a plated through BARREL... I am measuring the hole break out on an external PTH annular ring. IPC-2221 Figure 9-2 & Table 9-2. Victor, ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________