Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 25-52 found under Bearing Pivot by Warren Industries Incorporated. The National Stock Number assigned to this part is 3120002197187, 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 25-52.