Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 91916189 found under Valve Pressure Equa by Thales Aerospace. The National Stock Number assigned to this part is 4820011306190, 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 91916189.