Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2.5-1750-FSG ITEM 2 found under Seat Valve by Robert H Wager Companyinc. The National Stock Number assigned to this part is 4820014405894, 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 2.5-1750-FSG ITEM 2.