Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MODEL 20 20I found under Semiconductor Device Photo by Spectronics Corporation. The National Stock Number assigned to this part is 5961015483563, and the Federal Supply Class is 5961 Semiconductor Devices And Associated Hardware. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MODEL 20 20I.