Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A1N416 found under Bearing Half Sleeve by Mks Instruments Inc. The National Stock Number assigned to this part is 3120009860526, 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 A1N416.