Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 172X81 found under Base Side Bearing by General Electric Co. The National Stock Number assigned to this part is 2240006324720, and the Federal Supply Class is 2240 Locomotive And Rail Car Accessories And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 172X81.