Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number WBS20-4Y A2252 found under Bearing Plain Self Aligning by Timken Company The. The National Stock Number assigned to this part is 3120013306397, 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 WBS20-4Y A2252.