Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 311235F91 found under Valve Check by Grandi Motori. The National Stock Number assigned to this part is 4820013645247, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 311235F91.