Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number KJB444903B found under Bushing Sleeve by Kamatics Corporation. The National Stock Number assigned to this part is 3120015008244, 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 KJB444903B.