Complaint pins has a hole (opening) in the middle on the insertion portion of the pins so it can compress more and cause less damage to the barrel in the board. Non-compliant has a solid base so there is more chance the pins will dig-in and damage the barrels. The hole size has to be more exact for Non-compliant pins. Hope this helps James Cagle Tyco Printed Circuit Group-Hayward Division email: [log in to unmask] What does "compliant connectors" mean? --------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------