Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S1565-20453-4 found under Housing Assembly Main Rotor by S And L Aerospace Metals Llc. The National Stock Number assigned to this part is 1650001489100, 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 S1565-20453-4.