Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MI51SMS-24-BLK W found under Annunciator by Electrodynamics Inc. The National Stock Number assigned to this part is 6350001330689, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MI51SMS-24-BLK W.