Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 175B3900 found under Bearing Roller Jour by Kapl Inc. The National Stock Number assigned to this part is 3110013858106, 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 175B3900.