Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R-6181-BP PIECE 44 found under Ball Bearing by Ashcroft Inc. The National Stock Number assigned to this part is 3110012758590, 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 R-6181-BP PIECE 44.