Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BB187-1A05 found under Ball Bearing by Beaver Precision Products Inc. The National Stock Number assigned to this part is 3110014221381, 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 BB187-1A05.