Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 39Y8421 found under Cable Assembly Spec by Ibm. The National Stock Number assigned to this part is 5995016326916, and the Federal Supply Class is 5995 Cable Cord And Wire Assemblies Communication Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 39Y8421.