Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 17S2-4 found under Bearing Ball Thrust by Ellis And Watts International Llc. The National Stock Number assigned to this part is 3110011530958, 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 17S2-4.