Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1520-S250I found under Server Automatic Data Processing by Symmetricom Inc. The National Stock Number assigned to this part is 7035015458941, and the Federal Supply Class is 7035 Adp Support Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 1520-S250I.