Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4001 found under Magneto Ignition by Unison Industries Llc. The National Stock Number assigned to this part is 2925010250082, and the Federal Supply Class is 2925 Engine Electrical System Components Aircraft Prime Moving. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 4001.