1-350766-1 is a 3-circuit socket header assembly for the 5.0 mm Power Key Connectors (5.0 PKC) wire-to-board connector system. This Universal MATE-N-LOK header features a contact centerline spacing of 0.800 inches (20.32 mm) and is designed with UL94V-0 flammability-rated nylon housing in natural color. The connector incorporates pre-tinned socket contacts with duplex finish (gold plating in mating area over nickel underplate) and is engineered for reliable mating with corresponding plug housings. The design includes protective locking levers surrounded by walls to prevent tangling with wires, and the connector is recognized under UL Component Program File No. E28476 and CSA File No. LR7189. This header assembly is ideal for power circuit applications in home appliances, particularly gas appliances, where compact design and secure connections are essential.