Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 525533K1 found under Bearing Sleeve by Lucas Western Inc. The National Stock Number assigned to this part is 3120004254199, 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 525533K1.