Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number WJ-8618B FPK4C found under Microcircuit Set by Drs Signal Solutions Inc. The National Stock Number assigned to this part is 5962013312605, and the Federal Supply Class is 5962 Microcircuits Electronic. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like WJ-8618B FPK4C.