Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number UA534149-21 found under Cooler Hydraulic Oi by Triumph Thermal Systems Inc. The National Stock Number assigned to this part is 1650012275464, 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 UA534149-21.