Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5315815D1 found under Stem Needle Valve by Elsag Bailey Inc. The National Stock Number assigned to this part is 4820013098155, 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 5315815D1.