Wurth WA-SMSR Series SMT Reverse Steel Spacers, M3 WA-SMSR series PCB SMT reverse spacers made from tin plated steel with an M3 thread. These SMT spacers are soldered on the top to create spacing on the bottom of the PCB. The spacers are suitable for automated assembly and offer a high tightening torque and mechanical strength. When used on a standard PCB thickness of 1.6 mm these SMT spacers can be used to create distances from 1 mm to 10 mm