Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1970-0025 found under Electron Tube by Hewlett Packard Co. The National Stock Number assigned to this part is 5960003510413, and the Federal Supply Class is 5960 Electron Tubes And Associated Hardware. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 1970-0025.