Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 21C-10-S-3-B found under Transmitter Temperature Electric by Rdf Corporation. The National Stock Number assigned to this part is 6685015520272, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 21C-10-S-3-B.