I would suggest that the manufacturer's spec be reviewed for this information (hole size and spacing). The recommendation to solder or not solder should be a customer requirement for the assy of the module based on the number of mates the connector will have in field applications. Hope it helps. Dean Lillibridge NEWvENTURE TECHNOLOGIES -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of [log in to unmask] Sent: Wednesday, October 17, 2001 1:58 PM To: [log in to unmask] Subject: [TN] press fit pins Where do I find information regarding hole size, plating thickness recommedations regarding whether these should subsequently be soldered etc? I have looked in 2221 and just can't find anything Susan Mansilla Robisan Lab