Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number C88019 found under Valve Check by Itt Bell And Gosset Hydronics. The National Stock Number assigned to this part is 4820010445258, 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 C88019.