The unshrouded male pins are square, gold-plated on the mating surface (15.0 µinch) and tin-plated on the solder posts.
Pitch and Board Footprint
The 0.110 inch (2.79 mm) solder post length fits standard through-hole boards; the 0.157 inch (4.00 mm) mating pin length engages with the receptacle contact beam.
For a connector that may be mated a few dozen times during assembly and field service, this plating grade is appropriate — the gold layer prevents oxidation that would increase resistance on tin contacts in low-current signal paths.