Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D1770 PC 3 found under Ball Valve Ported by P J Valves Inc. The National Stock Number assigned to this part is 4820011902908, 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 D1770 PC 3.