Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 8MAV8UFSX found under Valve Check by Anchor Swan Corp. The National Stock Number assigned to this part is 4820006705369, 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 8MAV8UFSX.