Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 23399PC3 1 1 2IN found under Flange Gland Valve by Velan Valve Corporation. The National Stock Number assigned to this part is 4820015043364, 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 23399PC3 1 1 2IN.