Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 604 104 4X found under Circuit Card Assembly by Ametek Programmable Power Inc. The National Stock Number assigned to this part is 5998011659378, and the Federal Supply Class is 5998 Electrical And Electronic Assemblies Boards Cards And Associated Hardware. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 604 104 4X.