Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1280-263 found under Relay Electromagnetic by Singer Co The. The National Stock Number assigned to this part is 5945010249370, 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 1280-263.