Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ESI990647-23D found under Kit Nvis Mod by Electro Soft Inc. The National Stock Number assigned to this part is 6220014703054, and the Federal Supply Class is 6220 Electric Vehicular Lights And Fixtures. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like ESI990647-23D.