Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 9M5431 found under Connector Fluid Pump by Caterpillar Inc. The National Stock Number assigned to this part is 4320002354095, 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 9M5431.