Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S55SC-150 found under Lamp Sodium by American National Standards Inst. The National Stock Number assigned to this part is 6240010809620, and the Federal Supply Class is 6240 Electric Lamps. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like S55SC-150.