Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number N2505 found under Seat Valve by P J Valves Inc. The National Stock Number assigned to this part is 4820010624527, 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 N2505.