Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 400GB 131 found under Fuel Separator Emis by Mack Trucks Inc. The National Stock Number assigned to this part is 2910011490944, and the Federal Supply Class is 2910 Engine Fuel System Components Nonaircraft. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 400GB 131.