Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 164539 found under Hub Idler by Dresser Systems Inc. The National Stock Number assigned to this part is 3950008042716, and the Federal Supply Class is 3950 Winches Hoists Cranes And Derricks. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 164539.