Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 505 00601 55 found under Relay Control Monitoring by Kato Engineering Inc. The National Stock Number assigned to this part is 5945016591257, 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 505 00601 55.