Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 74614 MVH-Z1A found under Piston Assembly Valve by Ross Operating Valve Co. The National Stock Number assigned to this part is 4820003836242, 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 74614 MVH-Z1A.