Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SG3178PC15 found under Bearing Block Rotor by Siemens Demag Delaval Turbomachi. The National Stock Number assigned to this part is 3120003987158, 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 SG3178PC15.