Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AT-52UC found under Shield Bearing Replacement by Air Tight Llc. The National Stock Number assigned to this part is 3110016151797, and the Federal Supply Class is 3110 Bearings Antifriction Unmounted. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like AT-52UC.