Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PI3257 found under Float Carburetor by Osgood Co The. The National Stock Number assigned to this part is 2910003607086, 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 PI3257.