Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S6165-63552-216 found under Servovalve Hydraulic by Sikorsky Aircraft Corporation. The National Stock Number assigned to this part is 1650003469733, and the Federal Supply Class is 1650 Aircraft Hydraulic Vacuum And De-Icing System Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like S6165-63552-216.