Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1159SCH253-9 found under Actuator Rudder Hyd by Gulfstream Aerospace Corp. The National Stock Number assigned to this part is 1620012165539, and the Federal Supply Class is 1620 Aircraft Landing Gear Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 1159SCH253-9.