Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4251784-502 found under Antenna Element by Sensor And Antenna Systems. The National Stock Number assigned to this part is 5985007347460, 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 4251784-502.