Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TB939 found under Deflector Dirt And Liquid by Ingersoll Dresser Pump Co. The National Stock Number assigned to this part is 4320005646706, 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 TB939.