Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number DW1000SPEH ITEM 8 found under Seat Valve by Edro Corporation The. The National Stock Number assigned to this part is 4820013512979, 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 DW1000SPEH ITEM 8.