Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A420 056255 00 found under Solenoid Assembly by Guardian Electric. The National Stock Number assigned to this part is 5945009636071, 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 A420 056255 00.