Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 449 310 402 101 found under Bearing Set Sleeve by Bell Helicopter Textron Inc. The National Stock Number assigned to this part is 3120015241060, and the Federal Supply Class is 3120 Bearings Plain Unmounted. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 449 310 402 101.