Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number DMS 77030B found under Electron Tube by Dla Aviation. The National Stock Number assigned to this part is 5960001888564, 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 DMS 77030B.