Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MA50-ACNO-12 found under Valve Slew Stop by Parker Hannifin Corporation. The National Stock Number assigned to this part is 4820014794975, 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 MA50-ACNO-12.