Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number DL 645 found under Divider Power Radio Frequency by Technical Research And. The National Stock Number assigned to this part is 5985014765550, and the Federal Supply Class is 5985 Antennas Waveguides And Related Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like DL 645.