Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 39Y3 AND CDS D4 found under Valve Regulating Fl by Hunt Valve Company Inc. The National Stock Number assigned to this part is 4820013777462, 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 39Y3 AND CDS D4.