Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number C334-Z21-C840 found under Contact Kit Electri by Siemens Schweiz Ag. The National Stock Number assigned to this part is 5999010385526, and the Federal Supply Class is 5999 Miscellaneous Electrical And Electronic Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like C334-Z21-C840.