Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number GT30-C-4-E-50-C-1-A-12-A-41 found under Pump Centrifugal by Barnes John S Corp. The National Stock Number assigned to this part is 4320014452910, and the Federal Supply Class is 4320 Power And Hand Pumps. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like GT30-C-4-E-50-C-1-A-12-A-41.