Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 96C4 found under Cock Poppet Drain by Auto Valve Inc. The National Stock Number assigned to this part is 4820001819227, 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 96C4.