Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 051-00001-13 found under Bearing Ball Annular by Kovatch Corp. The National Stock Number assigned to this part is 3110012729845, 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 051-00001-13.