Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1685 found under Seal Assy Fuel Valv by O And S Acquistion Llc. The National Stock Number assigned to this part is 2910005620013, 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 1685.