Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HSH128CH SER 3ZK00002 found under Air Conditioner by Mcquay The. The National Stock Number assigned to this part is 4120014412334, and the Federal Supply Class is 4120 Air Conditioning Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like HSH128CH SER 3ZK00002.