Ron, We've tried it both ways. The problem we got into with square pads was that it was more suseptable to solder slivers between pads, but we were going across a wave. We have never experienced this problem with circular pads. Larry Campbell BFGoodrich, Avionics Systems [log in to unmask] ******************************************************* >>> Ron Hollandsworth <[log in to unmask]> 08/05/97 11:27am >>> Hello TechNetters: I have a question concerning pad design. Connector pad design/shape for through hole connectors. The connector is a 50 mil pitch connector. Question: "Is there an advantage to round vs square pad design if the connector is going to be wave soldered?" This is a High Rel Class 3 product (Military). What experience can you all share on this question. We will be soldering without the aid of a hot air knife. We have a Dover Soltec Delta Wave solder machine and are using Kester 973 VOC free Water Based No-clean flux being sprayed onto the board with convection preheating. You can reply over TechNet or direct. Ron Hollandsworth [log in to unmask]