The M50-3500642 is a 12-contact 2-row 1.27mm male Board-to-board Pin Header with gold plated phosphor bronze contacts, 100% tin over nickel plated termination and black UL94V-0 polyamide (nylon) 6T housing. The M50 series plug has 3mm mating pin height, vertical connector orientation and PC tail/through board connection type. It is suitable for use with 0.4mm square mating pin size.