Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 20707-502-000 found under Seam Detector Assem by Calcomp Inc. The National Stock Number assigned to this part is 5963012339529, and the Federal Supply Class is 5963 Electronic Modules. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 20707-502-000.