Comments : ------------------------[ Original Message ]-------------------- To : ISMTP@Longmont64@MCO[[log in to unmask]] Cc : From : BILL RUGG@ENG12@MCO Date : Tuesday, May 28, 1996 at 2:13:05 pm MDT - Hi I am trying to establish a PCBA flexure force level for compression connectors. The compression connector and mating PCB surface is tin lead. The measured contact force per contact range from 170 to 280 grams. The force generated a 0.57% Bow and Twist after soldering which has some margin below the ANSI/J-STD-001 9.2.3 of 0.75% for SMT boards. Does anyone know of a solder joint or a assembled component stress guideline other than the J-STD-001 Bow and Twist Specification. Thanks, Bill