Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S124K39 found under Semiconductor Devic by Hydro Aire Inc. The National Stock Number assigned to this part is 5961010381272, and the Federal Supply Class is 5961 Semiconductor Devices And Associated Hardware. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like S124K39.