Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HY3F found under Valve Linear Directional Control by A A A Products Co. The National Stock Number assigned to this part is 4820015573075, 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 HY3F.