Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PC1216-3 found under Seat Valve by Parmatic Pollution Control. The National Stock Number assigned to this part is 4820014251007, 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 PC1216-3.