Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B851668 found under Retainer Electron T by Mutron Corp. The National Stock Number assigned to this part is 5960005014841, 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 B851668.