Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4MS1F1 found under Relay Electromagnet by Olympic Controls Corp. The National Stock Number assigned to this part is 5945005026379, 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 4MS1F1.