Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 581-NV38P found under Valve Angle by Wilkes And Mc Lean Ltd. The National Stock Number assigned to this part is 4820011361952, 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 581-NV38P.