Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 9158-4500 found under Stem Fluid Valve by Mcnally Industries Llc. The National Stock Number assigned to this part is 4820003497275, 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 9158-4500.