Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number N 518 30 1 1 2IN50T100PSI found under Valve Regulating Fl by Leslie Controls Inc. The National Stock Number assigned to this part is 4820011799879, 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 N 518 30 1 1 2IN50T100PSI.