The HDP26-24-21SN-L015 is a sealed 21-way plug connector from the HDP20 series featuring a 24-shell housing with N-seal environmental protection and an integrated threaded adapter. The connector accommodates 17 size 16 contacts and 4 size 12 contacts, providing flexible contact configuration for diverse wiring requirements. It is designed with black housing and reverse polarity protection to ensure proper mating orientation and prevent incorrect connections. The N-seal design delivers robust environmental sealing suitable for harsh industrial and automotive environments, while the threaded adapter enables secure panel-mount installation. This connector is commonly used in transportation, industrial control systems, and heavy equipment applications where reliable, sealed multi-pin connections are essential.