Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A1253 found under Relay Electromagnetic by Couch S H Co. The National Stock Number assigned to this part is 5945000595340, 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 A1253.