Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 11-524 found under Filter Element Fluid by Donaldson Co Inc. The National Stock Number assigned to this part is 1650008574465, 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 11-524.