Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number G89-5-2STEM found under Stem Valve by Gas Equipment Engineering. The National Stock Number assigned to this part is 4820008933717, 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 G89-5-2STEM.