Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 558-5478-001 found under Hardware Kit Electr by J F C Electronics Inc. The National Stock Number assigned to this part is 5340006896552, and the Federal Supply Class is 5340 Hardware Commercial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 558-5478-001.