Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PH260790 ITEM 4 found under Valve Regulating Fluid Pressure by Wheeler Michael N. The National Stock Number assigned to this part is 4820015753693, 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 PH260790 ITEM 4.