Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S21-1172-1 found under by Nmb Minebea Uk Ltd. The National Stock Number assigned to this part is 3120004230235, 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 S21-1172-1.