Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number KR20-CWB found under Bearing Plain Spherical by Kamatics Corporation. The National Stock Number assigned to this part is 3120015031528, 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 KR20-CWB.