Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number GCS4H4RK8 found under Amplifier Audio Radio Frequency by Empower Rf Systems Inc. The National Stock Number assigned to this part is 5996014851417, 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 GCS4H4RK8.