Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 539-001-4 found under Capacitor Variable by Erie Specialty Products Inc. The National Stock Number assigned to this part is 5910014462530, and the Federal Supply Class is 5910 Capacitors. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 539-001-4.