First, let me clarify what I think is your question. Your reference is to IPC-A-610B, section 4.1, Table 4-1. No such table exists in IPC-A-610A. There is no given percentage for a maximum quantity of pinholes as long as the wetting requirements described in Table 4-1 are met. This is stated in the SPECIAL NOTE in section 4.1, page 52 in the middle of the first column on the page. Wetting to the lead and PTH barrel are the key characteristics which must be met assuming the minimum hole fill is met. Obviously, the more pinholes or voids in a solder joint the more likely that this will effect wetting between lead and barrel. Hopefully, I've addressed your question. Bruce Wooldridge DSC Communications Vice Chairman, IPC-A-610 Task Group 214/519-6170 [log in to unmask] ______________________________ Reply Separator _________________________________ Subject: Pinholes Author: [log in to unmask] at SMTPLINK Date: 09/28/95 04:47 PM To clarify IPC-A-610A Section 4.2 Table 4-1. We are unclear on what percentage of pin holes are allowable on supported holes. Please help ! Please respond ASAP Thanks