Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 16626 ITEM 13 found under Valve Check by Hexco International. The National Stock Number assigned to this part is 4820012595717, 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 16626 ITEM 13.