Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number DMB171A03 found under Retainer Electron Tube by Measurement Specialties Inc. The National Stock Number assigned to this part is 5960002967002, 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 DMB171A03.