Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A258A-390 found under Relay Solid State by Time Mark Corp. The National Stock Number assigned to this part is 5945012667662, 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 A258A-390.