Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 21 102A found under Power Supply by Ducommun Technologies Inc. The National Stock Number assigned to this part is 6120009839174, and the Federal Supply Class is 6120 Transformers Distribution And Power Station. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 21 102A.