Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 398B found under Semiconductor Device Diode by Westinghouse Electric Corp. The National Stock Number assigned to this part is 5961001926262, 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 398B.