Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5920-99-1057261 found under Fuse Cartridge by Nato Stock Number Assigned By An. The National Stock Number assigned to this part is 5920000081636, 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 5920-99-1057261.