Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HCD-12B found under Relay Electromagnet by Tyco Electronics Corporation. The National Stock Number assigned to this part is 5945012169909, and the Federal Supply Class is 5945 Relays And Solenoids. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like HCD-12B.