Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3933C9 1IN found under Valve Ball by Grinnell Corp. The National Stock Number assigned to this part is 4820014296022, 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 3933C9 1IN.