Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number KC-10039 found under Bearing Ball Annular by Rotron Incorporated. The National Stock Number assigned to this part is 3110009738166, 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 KC-10039.