Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D11TYPE438 found under Pump Centrifugal Sp by Howden Fluid Systems. The National Stock Number assigned to this part is 4320000611307, 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 D11TYPE438.