Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 528172 found under Shield Bearing Repl by Alfa Laval Inc. The National Stock Number assigned to this part is 3110012908309, 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 528172.