Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4051 found under Valve Linear Directional Control by Stanley Black And Decker Inc. The National Stock Number assigned to this part is 4820014678767, 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 4051.