Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S1E10031 ITEM 7 found under Disk Valve by Vacco Industries. The National Stock Number assigned to this part is 4820012563731, 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 S1E10031 ITEM 7.