Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D4524-5274 found under Ball Bearing by Trane Co. The National Stock Number assigned to this part is 3110001362696, and the Federal Supply Class is 3110 Bearings Antifriction Unmounted. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like D4524-5274.