Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number RS-4328 found under Valve Check Npt Air by Control Devices Incorporated. The National Stock Number assigned to this part is 4310015843018, and the Federal Supply Class is 4310 Compressors And Vacuum Pumps. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like RS-4328.