The M20-9981045 is a 20-contact 2.54mm male DIL Board-to-board Pin Header with gold plated phosphor bronze contacts, gold plated termination and black UL94V-0 polyamide (nylon) 6T housing. The M20 series connector has 3mm PC tail and vertical connector orientation and PC tail/through board connection type. It is suitable for use with 0.64mm square mating pin size. Suitable for interconnecting board to board.