Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S168-F1-183D found under Retainer Electron Tube by Tyco Electronics Corporation. The National Stock Number assigned to this part is 5960002494973, 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 S168-F1-183D.