Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 39-28-000 found under Bearing Plain Track Roller by Systems Engineering And Analytics Inc. The National Stock Number assigned to this part is 3120016695057, 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 39-28-000.