Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 04108055 found under Ball Check by Wilden Pump And Engineering Co. The National Stock Number assigned to this part is 4820014715899, 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 04108055.