Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 63B42305 found under Relay Voltage Sensing by Sacramento Air Logistics Center. The National Stock Number assigned to this part is 5945001060805, 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 63B42305.