Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3S4131 found under Gage Pressure Dial Indicating by Caterpillar Inc. The National Stock Number assigned to this part is 6620009222828, and the Federal Supply Class is 6620 Engine Instruments. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 3S4131.