Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number FV-1 4-C 1 4X1 2SAE found under Valve Expansion by Sporlan Valve Co. The National Stock Number assigned to this part is 4820014201060, 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 FV-1 4-C 1 4X1 2SAE.