Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 54-744 found under Stem Air Valve by Itw Industrial Finishing. The National Stock Number assigned to this part is 4820004303425, 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 54-744.