Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 16398 ITEM NO.2 found under Plug Rotary Valve by Cunico Corporation. The National Stock Number assigned to this part is 4820012901093, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 16398 ITEM NO.2.