Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number VK200 21 4B found under Coil Radio Frequency by Amperex Electronic Corp. The National Stock Number assigned to this part is 5950004195406, and the Federal Supply Class is 5950 Coils And Transformers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like VK200 21 4B.