Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number FSB0052120 found under Fuse Module Assembl by Progeny Systems Corporation. The National Stock Number assigned to this part is 5920016453433, and the Federal Supply Class is 5920 Fuses Arresters Absorbers And Protector. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like FSB0052120.