Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S19-19489 found under Servovalve Hydraulic by Denison Hydraulik Gmbh. The National Stock Number assigned to this part is 4820013523284, 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 S19-19489.